I, understandably, had a number of inquiries regarding a version of Scheduler for Moodle 3.11, and the current version was tagged as compatible only with Moodle 3.9.
Not least because we are migrating our own site to Moodle 3.11 soon, i had a look at the plugin now. As far as I'm aware, the latest release (i.e. 3.7.0) of Scheduler works with Moodle 3.10 and 3.11 as well, up to the following caveats:
- In Moodle 3.11, with debug messages switched on, you will see some warning messages about a deprecated API (user_picture::fields). These are warning messages only, and can be ignored. (They are fixed on the master branch but not on the MOODLE_37_STABLE branch, as this would make it incompatible with versions before 3.11.)
- Not all of the automated tests will work (this is always a challenge between Moodle releases); but as far as I can see, the underlying features do work.