I have a Sync problem

[roverdublin]

My Sync is stuck and I do not see any errors in my Lightroom Activity.

Can I delete the WEB Lightroom Library?

Am I right to say that this is not the Lightroom Classic Library?

https://lightroom.adobe.com/libraries

After this, I would like to do REBUILD SYNC DATA in Lightroom Classic.

Is that the proper way?