MATLAB: Previously accessible file is now inaccessible.

error loading files matlab 2019a

The IT upgraded my matlab and I keep receiving this error when I want to open an existing file. 
Previously accessible file "C:\Program
Files\MATLAB\R2019a\toolbox\shared\reqmgt\+slreq\+data\@ReqData\ReqData.p" is now
inaccessible.
Error in slreq.utils.loadLinkSet
Error in rmiml.getAll

Best Answer

Try using the following command which may solve your problem. 
rehash toolboxcache;
For more information, refer the following link: https://www.mathworks.com/help/matlab/ref/rehash.html
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