Lightroom CC Mobile Android doesn't display thumbnails

My thumbnails of pictures in albums on Lightroom CC Mobile on Android aren't displaying and instead are grey boxes. When I am offline the pictures don't load I have downloaded offline either.

I sometimes get the error message development version failed to load or something similar.

I know this has been talked about on these forums before and the workaround was simply to uninstall and reinstall Lightroom Mobile CC which I did last time but it meant once I installed again I had to go through all my 217 albums individually and choose to store offline again. I like to keep my photos offline and I have the storage on my phone to do it.

This did fix the problem but it has happened again only about three weeks later. It takes hours to go through all my albums (about 11,000 photos) and click each individual album to store offline as there isn't a global option to do this.

Not only this the 20gb or so of photos from my first Lightroom mobile installation hasn't deleted even though the app is uninstalled and I'm not entirely sure how to delete this. I have a 64gb phone and with the second install and my photos stored locally on Lightroom mobile if I uninstall it again with the operating system and apps and music on my phone I don't have enough storage for a third installation. How do I delete the old photos from my previous Lightroom mobile installations?

This driving me crazy and I am paying £10 a month for the Lightroom CC storage service locked into a contract with a £60 penalty for cancelling early.

What should I do?