Piwigo 13.6.0 - Advanced Menu Manager has no content

[ClaudiaLev]

I am using the plugin Advanced Menu Manager and it worked fine for many years.

But when I open the plugin now in the admin panel to make some changes it shows no longer any content. There is nothing to see in the plugin, therefore I am no longer able to change the menu.

It always looked like this:

Now it looks like this:

I use Piwigo 13.6.0 and Grum Classes is installed

[ClaudiaLev]

It seems to be a problem with PHP 8.
I hope it will be fixed.

[AK-CCM]

It would be really great if the Advanced Menu Manager would be fully functional with PHP 8.
Thanks in advance to the contributors!

[caressofsteel]

I have the same issue with the plugin. A basic menu editor should be built into the core of Piwigo with the ability to manipulate visibility and structure of menu items.

[MikeImbar]

I have the same issue as well. Would be great if it could be fixed, cheers.

[plegall]

I think the bug is fixed with GrumPluginClasses 3.5.15, see #4 (comment)