Can't upload PDF to document cloud anymore

Every since the latest update to Adobe Acrobat I haven't been unable to upload PDFs to doument cloud for sharing with coworkers. When I open a PDF and click on the icon of the person with the plus sign to email a coworker, I then get a spinnng wheel on the icon of a cloud and a circle and it never uploads and never e-mails. 

Is this a capacity issue because more people are using this service in the current WFH environment? Is there anyway around this? Really need to continue our workflow of sharing PDFs in the cloud for commenting. 

Any advice appreciated.