Upgrading Drupal

Like the title says, everything worked well until I upgraded to 9.3 from 9.2. Its is a composer based installation.

When i try to access one of the paths the first gives me this

The website encountered an unexpected error. Please try again later.

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "user.admin_permissions.module" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 206 of core/lib/Drupal/Core/Routing/RouteProvider.php).

I have a site with Drupal 7. Recently all paths are broken. Even my account login path is broken with Not Found error. I don't remember what module I used to generate those paths (simplified path).

I would like to ask for help on how to disable them. and how to gain the admin path so I can get into the admin portal page again.

Thanks for you all.

Hello. I'm maintaining multisite Drupal 8 installation. If I do upgrade, I do following:

- install new codebase to separate directory

- move sites one-by-one to new codebase and invoke drush cr, drush updatedb, drush locale-check, drush locale-update

- remove old codebase if it is not needed anymore

This aproach has an advantage that if somethig gets wrong with siteX then I easily do rollback for siteX and have a time to investigate situation. During investigation time, part of sites can run upgraded and part with old codebase.

My site is installed using a 'oneclick' install via my hosting company.

The current version is 8.9.16, php 7.4.29, db 5.7.37-40-log.

It is prompting me to upgrade to version 9.x, and as far as I can see it is either via Drush or Composer.

I don't know if it is installed using TAR, DRUSH, Composer or something else...actually I'm a bit in the dark here.
So my question is, what do I need to check to find out how to update my Drupal?

Any ideas on this error? I testet flushing the cashes but i did not work. Cant run update.php. Im stuck

The website encountered an unexpected error. Please try again later.
Error: Call to undefined function twig_render_template() in Drupal\Core\Theme\ThemeManager->render() (line 384 of core/lib/Drupal/Core/Theme/ThemeManager.php).

Hello forum,

I have a problem with my text editor. After the last update my ckeditor disappeared from my article mask. Now I tried to install it again from that site: https://www.drupal.org/project/ckeditor/releases/7.x-1.22

Then I got a warning that: 

ckeditor-7.x-1.22.tar.gz does not contain .info.yml files.

What can I do to get back my text editor? I would also install another wysiwyg editor.