Looks like the store was not upgraded correctly and some files were missed
sounds like someone deleted a file on your system. Suggest you compare your addons directory against a site backup or simply replace the missing file (but that could just take you to the next missing file). You should be able to disable the 'Discussions' addon and it should then NOT load the schema and reference the Enum class.
Thanks all
Was good feedback
The only way i login in admin, i rename "discussions" addon folder,
and was able to do the rest
I guest "stripe" addon is broken
I must to ask zip folder with him from help desk.
to uninstall and install again
Thank you for your valuable comments and messages