Lightroom CC: Won't load any photos, just a spinning blue wheel for days (Win 10)

For the last few weeks i've not been able to use Lightroom CC (windows 10),  due to it not being able to load anything. No collections or images, it wont even show how much space i have on the cloud etc. It says its licensed to me, and LR Classic and Photoshop open fine using this account, as does the Cloud app. i just have the blue spinning wheel. Ive logged in and out many times, rebooted, re-installed LR CC. Going nowhere.
If i try and load any images that are already in the Cloud i get an error message, so re importing them wont work.