Hi @CShel; thanks for joining our discussion here and welcome aboard!
Based on your description, it looks like Dropbox has not been set as a location in the Files app on your devices.
Can you please open the Files app on your device and press ‘edit’? Under locations you should see all available locations with Dropbox toggle off. Please switch this on and press 'done'.
After this is done then, please try again. You should see the functionality has been restored.
Keep us posted!