In the Google Chrome browser, I get an error when signing in. The strange thing is that this happens only in this browser, in other browsers the login occurs without problems. And this only happens on the mobile version.

You have configured wrongly most probably, especially URLs.

everything worked until i updated osclass

Do not see any relation to Osclass update.
Were you regulary checking for functionality before update?
You probaly need to check from google side what's wrong.

Then why don't I get an error when I log in from a Windows desktop computer?

Does your desktop use different osclass version? Suppose its still same.
Error should mean that google tried you redirect on url that is not configured in application.

I rolled back to osclass 8.02 and everything worked, now in the mobile version the login using the Google plugin works, moving categories also works, and as it turned out, the PWA application was restored

@Vlad7
Categories in backoffice are related to uncompatible jQuery UI version.

@Vlad7
Categories in backoffice are related to uncompatible jQuery UI version.

Which one do you recommend to use jQuery 1.8 or 3.6 as long as you are using the latest Epsilon theme and also all plugins of the latest version and php7.4?

3.6

3.6

right, I'm using this version!!!

Then you are ok and just wait for update.
If you need to reorganize categories, switch to 1.8 temporary