LrC Unexpected error opening catalog

[Xavier Sisternas]

After changing to Windows 10, i managed to upgrade my LrC catalog to v-10 (after solving problems following Adobe support advice). After closing LrC, i cannot open my catalog, always getting the same message

[LinSims]

Let me move this to the Lightroom Classic forum for you, which is the appropriate forum for your question.

The Using the Community forum is for help in using the Adobe Support Community forums, not for help with specific programs. Product questions should be posted in the associated product community.

[KR Seals]

What exactly is the message? Did you have Lightroom Classic make a backup?

[dj_paige]

Unexpected error opening catalog ... restore a recent backup copy of your catalog file and see if that opens. If that doesn't work, restore a recent backup to a different disk and see if it will open from a different disk.