diff -rupN --no-dereference pgadmin4-8.5/web/pgadmin/tools/sqleditor/__init__.py pgadmin4-8.5-new/web/pgadmin/tools/sqleditor/__init__.py
--- pgadmin4-8.5/web/pgadmin/tools/sqleditor/__init__.py	2024-04-01 13:34:05.000000000 +0200
+++ pgadmin4-8.5-new/web/pgadmin/tools/sqleditor/__init__.py	2024-04-11 12:33:48.544665119 +0200
@@ -321,7 +321,7 @@ def panel(trans_id):
 
     params['server_name'] = underscore_escape(s.name)
     if 'user' not in params:
-        params['user'] = underscore_escape(s.username)
+        params['user'] = underscore_escape(s.username or "")
     if 'role' not in params and s.role:
         params['role'] = underscore_escape(s.role)
     params['layout'] = get_setting('SQLEditor/Layout')