iOS upload to OneDrive not working

I have Adobe Acrobat Pro on my iPhone (version 20.04.00 (20200410.112051)). There is the option ‘share a copy’ which doesn’t seem to be working. I click that and choose ‘OneDrive’ then choose a folder and all documents from last few weeks that I’ve tried to upload just say ‘waiting’ and won’t upload.

 

Dows anyone know how to get it working?

 

Thanks