Can anyone help?

Question

1. After updating my firmware from SFOS 17.5.3 MR-3 to SFOS 17.5.4 MR-4-1 my client can't connect using the captive portal. 
 2. I can't created new guest user. if the try creating a guest user the is the messaged I receive, You do not have the privilege to add/modify the configuration

Ozgur Gursoy · Accepted Answer

It seems this issue fixed at SFOS 17.5.6 MR-6. It is working correctly now.

phuongpham · Answer

Great! 
 I see the change log include this fix:

NC-46024 [Authentication] Guest user registration is not working after upgrading to 17.5 MR4.