I’ve got mine working again. Presumably without any of the updates…but…
Using FTIP I went into /wwwroot/wp-content/plugins/lifterlms/includes/
and uploaded my previous version 3.3.1 and uploaded the lifterlms/includes/models folder and wrote over the 3.4.0 version here: /wwwroot/wp-content/plugins/lifterlms/includes/models
That has me up and running with whatever version it thinks I have….