It was tested on multiple devices/browsers and in incognito mode.
The load-scripts.php file is from WP core so I thought it may be due to some recent core release but we tried downgrading to 6.8 and it’s still the same.
This leads me to believe that it may be due to a more recent MainWP ver change. We’re currently on 5.4.0.10 and I believe you’re already quite familiar with our setup.
The user roles do have perms for Add Site (via Team Control), and this was working before with no recent changes on our end.
Could you please test on your end by adding a site via a user with a custom role (different then “administrator”) and advise if this is a potential bug?
If the user is “administrator” it works properly.