Hi Keith,
Are you seeing this? https://updraftplus.com/faqs/the-modal-windows-that-updraftplus-opens-cant-be-clicked-on-they-are-greyed-out/
If it is that, then please alert the authors of the plugin or theme which is the culprit, and let us know too so that we can also let them know. (The more the merrier - and sometimes plugin authors listen more to users, sometimes more to other plugin developers).
Best wishes,
David