I’m taking a course via Memrise for Android and lately one of my courses has multiple modules which refuse to load. I tap on them and they just don’t open, or if they do, the module gets stuck at the “downloading” screen.
In an effort to fix this I tried using the “make available offline” setting to download the course and not have to download course material every time from the server, but although the download appeared to complete, the modules would still not load.
What did work to fix it was going into the Android settings menu, then Apps, then click Clear Data. Just be sure to upload your progress before doing this, as it clears all the cached Memrise data and your stored username/password (but not your progress, assuming it uploaded!).