Edit Group not responding on a group

[Hoygen]

I just made a group in this way:

[ol]

User & Device section in the left navigation panel and navigate to User → User Groups.

If you have an existing user group, click on it to edit its settings. If you don't yet have a user group, click Create New to create one.

On the Edit User Group or New User Group page, enter the following information:

NameDuo SSL VPNTypeFirewall

Click the Create New button in the Remote groups section and select the Duo RADIUS remote server. You do not have to specify a group.

Click the OK button to save the user group settings.[/ol]

Now if I navigate to User → User Groups and click edit in the newly created group I get a loading page that never gives me the expected result.

On the other way, I can edit all the other groups perfectly fine.

[makco10]

Hello,

Can you edit the group via CLI? FortiOS version?

config user group
show

[Hoygen]

I can 

 edit "Duo Radius Group"

set member "Duo Radius Server"

next

I was just curious about why it happened in the gui.

Version is v5.6.3

Kindest regards.

[makco10]

Maybe a bug?, you can try upgrade to 5.6.6

Regards.