I've released the Adaptable theme (https://moodle.org/plugins/theme_adaptable) version 220.127.116.11 for Moodle 3.11 version 2021051700.00 (Build: 20210517) as follows:
please see the Changes.md file for details of the changes.
Please report any issues with this version ONLY here. This is a 'release candidate' version and as such should not really be put on production servers yet. I'm putting it out to the community to get feedback and spot any issues with the M3.11 compatibility that I haven't already dealt with. There are other known issues ('Bug' label on https://gitlab.com/jezhops/moodle-theme_adaptable/-/issues) but they pertain to all current (as of 16/8/21) maintained versions.