diff --git a/client/src/app/+admin/config/edit-custom-config/edit-basic-configuration.component.html b/client/src/app/+admin/config/edit-custom-config/edit-basic-configuration.component.html
index b5f31e5d9..cfd188f08 100644
--- a/client/src/app/+admin/config/edit-custom-config/edit-basic-configuration.component.html
+++ b/client/src/app/+admin/config/edit-custom-config/edit-basic-configuration.component.html
@@ -321,6 +321,20 @@
             </ng-container>
             </my-peertube-checkbox>
           </div>
+
+          <div class="form-group">
+            <label i18n for="videoChannelSynchronizationMaxPerUser">Max channel synchronization per user</label>
+
+            <div class="number-with-unit">
+              <input
+                type="number" min="1" id="videoChannelSynchronizationMaxPerUser" class="form-control"
+                formControlName="maxPerUser" [ngClass]="{ 'input-error': formErrors['import']['videoChannelSynchronization']['maxPerUser'] }"
+              >
+              <span i18n>{form.value['import']['videoChannelSynchronization']['maxPerUser'], plural, =1 {sync} other {syncs}}</span>
+            </div>
+
+            <div *ngIf="formErrors.import.videoChannelSynchronization.maxPerUser" class="form-error" role="alert">{{ formErrors.import.videoChannelSynchronization.maxPerUser }}</div>
+          </div>
         </ng-container>
 
       </ng-container>
diff --git a/client/src/app/+admin/config/edit-custom-config/edit-custom-config.component.ts b/client/src/app/+admin/config/edit-custom-config/edit-custom-config.component.ts
index 7ef04f757..482a66516 100644
--- a/client/src/app/+admin/config/edit-custom-config/edit-custom-config.component.ts
+++ b/client/src/app/+admin/config/edit-custom-config/edit-custom-config.component.ts
@@ -16,6 +16,7 @@ import {
   INSTANCE_SHORT_DESCRIPTION_VALIDATOR,
   MAX_INSTANCE_LIVES_VALIDATOR,
   MAX_LIVE_DURATION_VALIDATOR,
+  MAX_SYNC_PER_USER,
   MAX_USER_LIVES_VALIDATOR,
   MAX_VIDEO_CHANNELS_PER_USER_VALIDATOR,
   SEARCH_INDEX_URL_VALIDATOR,
@@ -182,7 +183,9 @@ export class EditCustomConfigComponent extends FormReactive implements OnInit {
           }
         },
         videoChannelSynchronization: {
-          enabled: null
+          enabled: null,
+          maxPerUser: MAX_SYNC_PER_USER
+
         },
         users: {
           enabled: null
diff --git a/client/src/app/core/rest/rest-extractor.service.ts b/client/src/app/core/rest/rest-extractor.service.ts
index 9541306de..a4ccf13f6 100644
--- a/client/src/app/core/rest/rest-extractor.service.ts
+++ b/client/src/app/core/rest/rest-extractor.service.ts
@@ -77,6 +77,7 @@ export class RestExtractor {
   }
 
   private buildErrorMessage (err: any) {
+    console.log(err)
     if (err.error instanceof Error) {
       // A client-side or network error occurred. Handle it accordingly.
       const errorMessage = err.error.detail || err.error.title
@@ -115,10 +116,6 @@ export class RestExtractor {
         .join('. ')
     }
 
-    if (err.error?.error) {
-      return err.error.error
-    }
-
     if (err.status === HttpStatusCode.PAYLOAD_TOO_LARGE_413) {
       return $localize`Media is too large for the server. Please contact you administrator if you want to increase the limit size.`
     }
@@ -142,6 +139,6 @@ export class RestExtractor {
       return $localize`Server is unavailable. Please retry later.`
     }
 
-    return $localize`Unknown server error`
+    return err.error?.error || err.error?.detail || err.error?.title || $localize`Unknown server error`
   }
 }
diff --git a/client/src/app/shared/form-validators/custom-config-validators.ts b/client/src/app/shared/form-validators/custom-config-validators.ts
index 519a1480a..bfbdb6fcf 100644
--- a/client/src/app/shared/form-validators/custom-config-validators.ts
+++ b/client/src/app/shared/form-validators/custom-config-validators.ts
@@ -106,6 +106,15 @@ export const MAX_VIDEO_CHANNELS_PER_USER_VALIDATOR: BuildFormValidator = {
   }
 }
 
+export const MAX_SYNC_PER_USER: BuildFormValidator = {
+  VALIDATORS: [ Validators.required, Validators.min(1), Validators.pattern('[0-9]+') ],
+  MESSAGES: {
+    required: $localize`Max synchronizations per user is required.`,
+    min: $localize`Max synchronizations per user must be greater or equal to 1.`,
+    pattern: $localize`Max synchronizations per user must be a number.`
+  }
+}
+
 export const CONCURRENCY_VALIDATOR: BuildFormValidator = {
   VALIDATORS: [ Validators.required, Validators.min(1) ],
   MESSAGES: {