Routing error with Drupal 10.2 (Route "entity.site_setting_entity_type.canonical" does not exist)

I got the exact same issue. It's only after I've inputted the first setting. After submitting the first setting it redirects to "/admin/content/site-settings" but same error as @gillesv. problem occured after upgrading to 10.2. Reinstalling the module doesn't change anything.

Did you try running drush updb after your upgrade?

If the issue still persists, test this patch. I think the problem is the renaming of the route.

It has been fixed in ✨ Support "Clone" functionality Fixed and is part of the dev release (not part of the recent stable release).

Although it was targeting another issue, it's solving this one.

Ah so I just need to make a new release to fix this? I plan to get a new release once I review and merge ✨ Add the ability to set a machine name for "settings_group" Needs review which is high up my to do list.

FTR: This is fixed in 2.0@alpha

Great thanks for confirming

Automatically closed - issue fixed for 2 weeks with no activity.

Should the working patch #4 merged to the stable 8.x-1.20 release as it is still an issue on that version?

If its fixed in https://git.drupalcode.org/project/site_settings/-/commit/8b5fc2b7289921... as per #5 shouldn't the backport to 8.x-1.x also be that same fix? I am happy to cherry-pick that backwards if someone can confirm that fixes it. The patch in this issue is taking a different approach.