Hi J_440,
I have just tested the scenario you mentioned in this thread. But it turn out the solver add-ins is working perfectly on my side.
And I can put ranges in the "changing variable cells", as you can see in the following image:
The version I tested is Excel for Mac version 16.37, may I confirm which Excel version you are using?
About Office: What version of Office am I using?
Regards,
Alex Chen