Excel won't save my work

Excel stops saving my work while I'm in the middle of creating worksheets. First it was an issue saying I am not authorized and I need to contact the administrator. It's my laptop, fairly new and I am the only user, thus the administrator. Then the latest is it changed to read only while I was working on it, again not allowing me to save to documents. And it is again telling me I am not the administrator,  my original problem returning. I've worked with 3 techs that had access to my computer and I'm still having problems. Over several hours they have:

Uninstalled and reinstalled my software  (Office home and student 2021)

Disabled my antivirus

Created a new user profile for me, which worked temporarily but I had to start from scratch personalizing my laptop

Disabled One Drive saying that was the cause.  No explanation why it became read only while I was working on it. That did not solve the problem.

Saving it to one drive did work when I could not save it to documents, which is all I want to do. I have used excel on many computers and never had an issue saving work in document. I know there was more attempts during the time with the techs but those were the main things I remember. I am wondering if it is faulty software because there appears to be no solution. If so, do I have any recourse?

New laptop, Widows 11, Office Home and Student 2021