cannot save file changes to cloud

I cannot save any modifications I make to file in the cloud even though it says. "Document Saved". I am using pCloud. pCloud is one of the best cloud providers as of today and many people use it. It seems to be supported in adobe acrobat because pCloud option is there - check the attached photo - and of course it requires the app of the cloud provider, pCloud, to be installed. By the way, I am using android and I have the last version of adobe acrobat. Please help.Thanks