Problems with user is not superadmin

Hello, when i try to acces with an user with no owner, first show a message (it’s ok) and after. show and error. It’s posible to fix?

And after the message show me this error:

And this message error in the servoy console:

Exception Object: org.mozilla.javascript.EcmaError: TypeError: Cannot call method "join" of null (/Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js#916)
MSG: TypeError: Cannot call method "join" of null (/Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js#916)
TypeError: Cannot call method "join" of null (/Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js#916)
TypeError: Cannot call method "join" of null (/Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js#916)
	at /Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js:916 (svy_nav_init_menu_items)
	at /Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js:779 (svy_nav_init)
	at /Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js:3663 (svy_nav_postLogin)
	at /Applications/Servoys/Servoy6_Test/workspace/svy_nav_navigation/globals.js:1424 (svy_nav_onOpen)

A user should always have a owner