I recently updated to e-OS 1.12.3 (on FP3) so this might be related.
App lounge has updated apps since then. But with the (official) reddit app it got stuck. Since 2 days now a notification is shown with “App Lounge - Installing Reddit”. I tried uninstalling the reddit app hoping the updater would stop and the notification would disappear. But the notification did not go away and now I can’t even install any more apps. I cleared the cache (not the data) of the App Lounge, I restarted but that didn’t help.
When I go into the App Lounge to the reddit app page it is marked as installing.
Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services