App-lounge no longer installs or updates

App Lounge will not install or update apps on my FP4. Upgraded to 1.18. Tried all the suggestions in the documentation. Then cleared the user data in Storage. Now apps will download but not install.

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone

Did you clear the storage and the cache?
What you also could try is tap on Force Stop of the app. Wait a few seconds and then tap on Open the app.

Maybe your internal memory is full?