I fixed the problem and found more problems related to this. I haven't confirmed yet, but I'm pretty sure that the administrators have placed a quota on how much disk space my profile can take. I had filled it up.
I went through my profile and found that in the AppData\Local\Microsoft\Power BI Desktop\ folder there are several cache folders. I tried to clear the cache following instructions here https://community.powerbi.com/t5/Desktop/How-to-clear-cache-in-Power-BI-Desktop/m-p/853321. However, Power BI Desktop wouldn't start, because the drive was full. So I first found the cache folder had a lot of data and cleared all but the most recent files. Then I opened Power BI Desktop and went to settings and clicked clear and set the size of the cache to a much smaller number.
At this point I have one of the desktops working. I believe that once I exit the one desktop that is working and log in to the other desktop, the change will be applied.
Thank you for all your help.