diff --git a/src/core/features/login/pages/site/site.ts b/src/core/features/login/pages/site/site.ts
index 6cc44b83f..b607ac068 100644
--- a/src/core/features/login/pages/site/site.ts
+++ b/src/core/features/login/pages/site/site.ts
@@ -498,7 +498,12 @@ export class CoreLoginSitePage implements OnInit {
 
         if (scheme && scheme != 'http' && scheme != 'https') {
             CoreDomUtils.showErrorModal(Translate.instant('core.errorurlschemeinvalidscheme', { $a: text }));
-        } else if (CoreLoginHelper.isSiteUrlAllowed(text)) {
+
+            return;
+        }
+
+        const allowed = await CoreLoginHelper.isSiteUrlAllowed(text);
+        if (allowed) {
             // Put the text in the field (if present).
             this.siteForm.controls.siteUrl.setValue(text);