diff --git a/CHANGES.md b/CHANGES.md
index c7a6f2993..9e8404623 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -17,6 +17,7 @@
 - Fix position problems cutting-pasting a component [Taiga #10677](https://tree.taiga.io/project/penpot/issue/10677)
 - Fix design tab has a horizontal scroll [Taiga #10660](https://tree.taiga.io/project/penpot/issue/10660)
 - Fix long file names being clipped when longer than allowed length [Taiga #10662](https://tree.taiga.io/project/penpot/issue/10662)
+- Fix problem with error detail in toast [Taiga #10519](https://tree.taiga.io/project/penpot/issue/10519)
 
 ## 2.6.1
 
diff --git a/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.cljs b/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.cljs
index e69475d1f..f4bacee8e 100644
--- a/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.cljs
+++ b/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.cljs
@@ -8,7 +8,10 @@
   (:require-macros
    [app.main.style :as stl])
   (:require
+   [app.common.data.macros :as dm]
+   [app.main.ui.ds.buttons.icon-button :refer [icon-button*]]
    [app.main.ui.ds.foundations.assets.icon :as i]
+   [app.util.i18n :as i18n :refer [tr]]
    [rumext.v2 :as mf]))
 
 (defn icons-by-level
@@ -26,12 +29,14 @@
    [:level [:enum :default :info :warning :error :success]]
    [:type  [:enum :toast :context]]
    [:appearance {:optional true} [:enum :neutral :ghost]]
-   [:is-html {:optional true} :boolean]])
+   [:is-html {:optional true} :boolean]
+   [:show-detail {:optional true} [:maybe :boolean]]
+   [:on-toggle-detail {:optional true} [:maybe fn?]]])
 
 (mf/defc notification-pill*
   {::mf/props :obj
    ::mf/schema schema:notification-pill}
-  [{:keys [level type is-html appearance children]}]
+  [{:keys [level type is-html appearance detail children show-detail on-toggle-detail]}]
   (let [class (stl/css-case :notification-pill true
                             :appearance-neutral (= appearance :neutral)
                             :appearance-ghost (= appearance :ghost)
@@ -44,12 +49,27 @@
                             :level-info     (= level :info))
         is-html (or is-html false)
         icon-id (icons-by-level level)]
-    [:div {:class class}
-     [:> i/icon* {:icon-id icon-id :class (stl/css :icon)}]
+    [:div {:class (dm/str class " " (stl/css :notification-pill))}
+     [:div {:class (stl/css :error-message)}
+      [:> i/icon* {:icon-id icon-id :class (stl/css :icon)}]
       ;; The content can arrive in markdown format, in these cases
-   ;;  we will use the prop is-html to true to indicate it and
-   ;; that the html injection is performed and the necessary css classes are applied.
-     (if is-html
-       [:div {:class (stl/css :context-text)
-              :dangerouslySetInnerHTML #js {:__html children}}]
-       children)]))
+      ;;  we will use the prop is-html to true to indicate it and
+      ;; that the html injection is performed and the necessary css classes are applied.
+      (if is-html
+        [:div {:class (stl/css :context-text)
+               :dangerouslySetInnerHTML #js {:__html children}}]
+        children)]
+
+     (when detail
+       [:div {:class (stl/css :error-detail)}
+        [:div {:class (stl/css :error-detail-title)}
+         [:> icon-button*
+          {:icon (if show-detail "arrow-down" "arrow")
+           :aria-label (tr "workspace.notification-pill.detail")
+           :icon-class (stl/css :expand-icon)
+           :variant "action"
+           :on-click on-toggle-detail}]
+         [:div {:on-click on-toggle-detail}
+          (tr "workspace.notification-pill.detail")]]
+        (when show-detail
+          [:div {:class (stl/css :error-detail-content)} detail])])]))
diff --git a/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.scss b/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.scss
index 3b6e4d5ff..febab627b 100644
--- a/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.scss
+++ b/frontend/src/app/main/ui/ds/notifications/shared/notification_pill.scss
@@ -83,3 +83,34 @@
   color: var(--notification-icon-color);
   margin-block-start: var(--notification-icon-margin);
 }
+
+.notification-pill {
+  display: grid;
+  max-height: 92vh;
+  overflow: hidden;
+  grid-template-rows: auto 1fr;
+}
+
+.error-message {
+  display: flex;
+  gap: var(--sp-s);
+}
+
+.error-detail {
+  overflow: auto;
+}
+
+.error-detail-title {
+  display: flex;
+  align-items: center;
+  cursor: pointer;
+}
+
+.expand-icon {
+  --icon-fill-color: var(--color-foreground-primary);
+  --icon-stroke-color: var(--color-foreground-primary);
+}
+
+.error-detail-content {
+  padding-left: var(--sp-xxxl);
+}
diff --git a/frontend/src/app/main/ui/ds/notifications/toast.cljs b/frontend/src/app/main/ui/ds/notifications/toast.cljs
index ee21818a1..e100cd0c7 100644
--- a/frontend/src/app/main/ui/ds/notifications/toast.cljs
+++ b/frontend/src/app/main/ui/ds/notifications/toast.cljs
@@ -21,12 +21,14 @@
    [:level {:optional true} [:maybe [:enum :default :info :warning :error :success]]]
    [:appearance {:optional true} [:enum :neutral :ghost]]
    [:is-html {:optional true} :boolean]
-   [:on-close {:optional true} fn?]])
+   [:show-detail {:optional true} [:maybe :boolean]]
+   [:on-close {:optional true} fn?]
+   [:on-toggle-detail {:optional true} [:maybe fn?]]])
 
 (mf/defc toast*
   {::mf/props :obj
    ::mf/schema schema:toast}
-  [{:keys [class level appearance type is-html children on-close] :rest props}]
+  [{:keys [class level appearance type is-html children detail show-detail on-close on-toggle-detail] :rest props}]
   (let [class (dm/str class " " (stl/css :toast))
         level (if (string? level)
                 (keyword level)
@@ -45,9 +47,14 @@
      [:> notification-pill* {:level level
                              :type type
                              :is-html is-html
-                             :appearance appearance} children]
-      ;; TODO: this should be a buttom from the DS, but this variant is not designed yet.
-      ;; https://tree.taiga.io/project/penpot/task/8492
+                             :appearance appearance
+                             :detail detail
+                             :show-detail show-detail
+                             :on-toggle-detail on-toggle-detail} children]
+
+
+     ;; TODO: this should be a buttom from the DS, but this variant is not designed yet.
+     ;; https://tree.taiga.io/project/penpot/task/8492
      [:> "button" {:on-click on-close
                    :aria-label "Close"
                    :class (stl/css-case :close-button true
diff --git a/frontend/src/app/main/ui/ds/notifications/toast.stories.jsx b/frontend/src/app/main/ui/ds/notifications/toast.stories.jsx
index 99f8857fb..5c6ff2b3d 100644
--- a/frontend/src/app/main/ui/ds/notifications/toast.stories.jsx
+++ b/frontend/src/app/main/ui/ds/notifications/toast.stories.jsx
@@ -17,6 +17,12 @@ export default {
     children: {
       control: { type: "text" },
     },
+    detail: {
+      control: { type: "text" },
+    },
+    showDetail: {
+      control: { type: "boolean" },
+    },
   },
   args: {
     children: "Lorem ipsum",
@@ -40,6 +46,14 @@ export const WithLongerText = {
   },
 };
 
+export const WithDetail = {
+  args: {
+    detail:
+      "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent lorem ante, bibendum sed ex.",
+    showDetail: true,
+  },
+};
+
 export const WithHTML = {
   args: {
     children:
diff --git a/frontend/src/app/main/ui/notifications.cljs b/frontend/src/app/main/ui/notifications.cljs
index e78ac7494..de7161db9 100644
--- a/frontend/src/app/main/ui/notifications.cljs
+++ b/frontend/src/app/main/ui/notifications.cljs
@@ -27,7 +27,14 @@
                          (= :floating (:position notification)))
         toast?       (or (= :toast (:type notification))
                          (some? (:timeout notification)))
-        content     (or (:content notification) "")]
+        content     (or (:content notification) "")
+
+        show-detail* (mf/use-state false)
+
+        handle-toggle-detail
+        (mf/use-fn
+         (fn []
+           (swap! show-detail* not)))]
 
     (when notification
       (cond
@@ -35,7 +42,10 @@
         [:> toast*
          {:level (or (:level notification) :info)
           :type (:type notification)
-          :on-close on-close} content]
+          :detail (:detail notification)
+          :on-close on-close
+          :show-detail @show-detail*
+          :on-toggle-detail handle-toggle-detail} content]
 
         inline?
         [:& inline-notification
@@ -55,4 +65,5 @@
         [:> toast*
          {:level (or (:level notification) :info)
           :type (:type notification)
+          :detail (:detail notification)
           :on-close on-close} content]))))
diff --git a/frontend/src/app/main/ui/workspace/tokens/errors.cljs b/frontend/src/app/main/ui/workspace/tokens/errors.cljs
index 1d9213c4d..d5c9918f3 100644
--- a/frontend/src/app/main/ui/workspace/tokens/errors.cljs
+++ b/frontend/src/app/main/ui/workspace/tokens/errors.cljs
@@ -14,7 +14,8 @@
 
    :error.import/style-dictionary-reference-errors
    {:error/code :error.import/style-dictionary-reference-errors
-    :error/fn #(str (tr "workspace.token.import-error") "\n\n" (str/join "\n\n" %))}
+    :error/fn #(str (tr "workspace.token.import-error") "\n\n" (first %))
+    :error/detail #(str/join "\n\n" (rest %))}
 
    :error.import/style-dictionary-unknown-error
    {:error/code :error.import/style-dictionary-reference-errors
@@ -74,3 +75,9 @@
                 (:error/fn err) ((:error/fn err) (:error/value err))
                 (:error/message err) (:error/message err)
                 :else err)))))
+
+(defn detail-errors [errors]
+  (->> errors
+       (map (fn [err]
+              (when (:error/detail err)
+                ((:error/detail err) (:error/value err)))))))
diff --git a/frontend/src/app/main/ui/workspace/tokens/sidebar.cljs b/frontend/src/app/main/ui/workspace/tokens/sidebar.cljs
index 5cb6da341..7379d944a 100644
--- a/frontend/src/app/main/ui/workspace/tokens/sidebar.cljs
+++ b/frontend/src/app/main/ui/workspace/tokens/sidebar.cljs
@@ -16,8 +16,7 @@
    [app.main.data.tokens :as dt]
    [app.main.refs :as refs]
    [app.main.store :as st]
-   [app.main.ui.components.dropdown-menu :refer [dropdown-menu
-                                                 dropdown-menu-item*]]
+   [app.main.ui.components.dropdown-menu :refer [dropdown-menu dropdown-menu-item*]]
    [app.main.ui.components.title-bar :refer [title-bar]]
    [app.main.ui.context :as ctx]
    [app.main.ui.ds.buttons.button :refer [button*]]
@@ -378,6 +377,7 @@
                             (fn [err]
                               (js/console.error err)
                               (st/emit! (ntf/show {:content (wte/humanize-errors [(ex-data err)])
+                                                   :detail (wte/detail-errors [(ex-data err)])
                                                    :type :toast
                                                    :level :error})))))
              (-> (mf/ref-val input-ref)
diff --git a/frontend/translations/en.po b/frontend/translations/en.po
index b3cd2df00..8e585a453 100644
--- a/frontend/translations/en.po
+++ b/frontend/translations/en.po
@@ -7272,3 +7272,7 @@ msgstr "Autosaved versions will be kept for %s days."
 #, unused
 msgid "workspace.viewport.click-to-close-path"
 msgstr "Click to close the path"
+
+msgid "workspace.notification-pill.detail"
+msgstr "Details"
+
diff --git a/frontend/translations/es.po b/frontend/translations/es.po
index f74563af4..2e39ff01a 100644
--- a/frontend/translations/es.po
+++ b/frontend/translations/es.po
@@ -7248,3 +7248,6 @@ msgstr "Los autoguardados duran %s días."
 #, unused
 msgid "workspace.viewport.click-to-close-path"
 msgstr "Pulsar para cerrar la ruta"
+
+msgid "workspace.notification-pill.detail"
+msgstr "Detalles"