diff --git a/backend/src/app/http/errors.clj b/backend/src/app/http/errors.clj
index 58acd948c4..7d6a1bb09c 100644
--- a/backend/src/app/http/errors.clj
+++ b/backend/src/app/http/errors.clj
@@ -29,19 +29,18 @@
 (defmethod handle-exception :validation
   [err req]
   (let [header (get-in req [:headers "accept"])
-        edata  (ex-data err)]
+        error  (ex-data err)]
     (cond
       (and (str/starts-with? header "text/html")
-           (= :spec-validation (:code edata)))
+           (= :spec-validation (:code error)))
       {:status 400
        :headers {"content-type" "text/html"}
        :body (str "<pre style='font-size:16px'>"
-                  (with-out-str
-                    (:data edata))
+                  (:hint-verbose error)
                   "</pre>\n")}
       :else
       {:status 400
-       :body edata})))
+       :body error})))
 
 (defmethod handle-exception :ratelimit
   [_ _]
diff --git a/backend/src/app/media.clj b/backend/src/app/media.clj
index a05f4c0c44..fc6808f7d0 100644
--- a/backend/src/app/media.clj
+++ b/backend/src/app/media.clj
@@ -32,7 +32,6 @@
 (defstate semaphore
   :start (Semaphore. (:image-process-max-threads cfg/config 1)))
 
-
 ;; --- Generic specs
 
 (s/def :internal.http.upload/filename ::us/string)
diff --git a/common/app/common/spec.cljc b/common/app/common/spec.cljc
index 10a174debb..7639d70215 100644
--- a/common/app/common/spec.cljc
+++ b/common/app/common/spec.cljc
@@ -186,10 +186,16 @@
   [spec data]
   (let [result (s/conform spec data)]
     (when (= result ::s/invalid)
-      (let [edata (s/explain-data spec data)]
+      (let [edata (s/explain-data spec data)
+            nhint (with-out-str
+                    (s/explain-out edata))
+            vhint (with-out-str
+                    (expound/printer edata))]
         (throw (ex/error :type :validation
                          :code :spec-validation
-                         :data data))))
+                         :data data
+                         :hint nhint
+                         :hint-verbose vhint))))
     result))
 
 (defmacro instrument!
diff --git a/frontend/src/app/main/ui.cljs b/frontend/src/app/main/ui.cljs
index 635d2afa64..9af5d11093 100644
--- a/frontend/src/app/main/ui.cljs
+++ b/frontend/src/app/main/ui.cljs
@@ -209,6 +209,18 @@
 ;; --- Error Handling
 
 (defmethod ptk/handle-error :validation
+  [error]
+  (ts/schedule
+   (st/emitf (dm/show {:content "Unexpected validation error (server side)."
+                       :type :error
+                       :timeout 5000})))
+  (when-let [explain (:hint-verbose error)]
+    (js/console.group "Server Error")
+    (js/console.error (if (map? error) (pr-str error) error))
+    (js/console.error explain)
+    (js/console.endGroup "Server Error")))
+
+(defmethod ptk/handle-error :spec-validation
   [error]
   (ts/schedule
    (st/emitf (dm/show {:content "Unexpected validation error (server side)."