DSub v. 5.5.2 has been recently pushed to F-Droid instead of v 5.0.3 with a lot of change but it's now not able to connect to Airsonic server when LDAP is used as set here in yunohost package.
See https://github.com/airsonic/airsonic/issues/260 for details.
The changes use sub_filter directive to make the server think it's madsonic and use old auth method.
SSOWAT user panel has been disable since it contains also a sub_filter_once directive