Permission denied for accessing any file/folder from the main directory(run directory) which was pasted in the run folder.

I am not able to access any folder or file from the main directory (which is my run directory). When I try to paste any file/folder into my run directory, I get the error which states, "Permission denied <Folder name>". Here I tried to paste a folder named kepsilon into the run folder and then tried to access it, but the error occurred.
Screenshot for the same is attached.

OpenFOAM 19-10-21, 4:32 p.m. Bhavik_S

You can use the following command to enter superuser mode, before trying the cd command.

sudo su

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