My installation of Moodle has not been updated for a long time.
It was version 2.6+ and the latest attforblock plugin.
My installation of Moodle is at version 3.7. The T.I. team migrated to another server and upgraded without the attforblock directory.
I was able to upgrade to attendance 126.96.36.199 (2016031501).
And now I can't upgrade to any higher version. The page is loading for a long time and then freezes.
When I access the course page and try to use the attendance shows an error.
Can someone help me?