Have a read of this thread App-lounge updates do not install, stuck at 0% noticing a dev proposing Draft: fix(install): keep a stalled download from blocking the install queue (!859) · Merge requests · e / os / App Lounge · GitLab
and this post App lounge can't download app (stuck at 0%) - #13 by Manoj
It is possible that your age restriction is an error wedged within App Lounge.
Success stories in current app-lounge threads seem to depend on the user doing “something different” rather than repeated attempts undo the reported issue.
Logout of App Lounge.
Clear Storage, rather than just Cache.
Power down, wait 20 seconds and Power on, rather than just Restart.
- (Line edit thanks to @camel)
Wait a minimum of 30 minutes before returning. Be prepared to repeat and wait 2 - 12 hours.
Avoid Update all.
Be prepared to use Aurora store and / or F-Droid to meet your needs and give App Lounge a “changed working environment”.
Other effective changes have included Network change from Wi-Fi to mobile data or reverse.