Hello,
How to contact the developer of Locker app (Locker
Thanks
See here: Locker: Upstream gone, UCM:static, remove urls (3d3bd72c) · Commits · F-Droid / Data · GitLab
The developer and upstream repo seem to have disappeared. Only thing to do is someone downloads the source code archive from the f-droid website and starts maintaining the app again.
Means? the maintainer /dev is gone or dead 