You are seeing this issue as a result of a bug in R2020a (updates 3 and earlier) with the "comserver" command. You can find the external bug report along which includes the workaround here:
As mentioned in the bug report, you can either upgrade to MATLAB R2020a Update 4 (or later) which has the fix for this issue, or you can try the following workaround:
In a R2020a MATLAB with admin rights:
%clear registry entries
comserver('unregister','User','all')
comserver('unregister');
%register MATLAB
regmatlabserver
Please note that these commands require administrative permissions.
If you do not have administrative permissions, I would recommend reaching out to your IT department so that they can provide the necessary permissions, or try the other option of upgrading to MATLAB R2020a update 4 or later.
