I can't enter the "Package Manager" page

[GK777]

If you did the backup via Softaculous then probably best to restore it the same way.

The example below relates to a Wordpress backup but gives you the idea....

Thank you!

I solved the problem in another way. I deleted all packages from cPanel. Now I can enter the Package Manager. Because of the update no packages were installed, so I can find out which one caused the problem.