Unable to edit group permissions in PAH when external auth (RH-SSO) is enabled

Description

When Private Automation Hub is configured to authenticate with RH-SSO for central auth the group permissions cannot be set. When an external user (not assigned the hubadmin role)  logs in the users groups are created, but a hubadmin user clicking the Edit button on the added group(s) returns a blank web page and breaks the UI. The browser page must be reloaded to recover the browser.

Steps to Reproduce

• Install PAH and RH-SSO
• Configure PAH and RH-SSO to allow PAH to authenticate users
• Create one or more groups in the RH-SSO realm
• Create a user in the RH-SSO realm and add the user to the created groups
• Login to PAH with the RH-SSO user credentials
• In another browser or incognito window login to PAH as a user with the hubadmin role
• Navigate to Users > Groups
• Click on one of the created groups
• Click the Edit button

Actual Behavior

The window turns blank. Going back in the browser history keeps the blank page. Only refreshing the URL (on a working URL) brings back the UI.

Expected Behavior

The group permissions editor should be displayed and the permissions for the group should be able to be set.