It may have happened that the antivirus software installed in your system has quarantined the particular .DLL file required by MATLAB during a virus scan. To reolve this issue, these qurantined files must be restored. Please refer to the follwoing MATLAB answer post for more information:
Additionally, verify if any paths of MATLAB files or folders have changed, which might be causing the error messages. In this case, it would help to add the new paths to MATLAB.
I hope this helps!
