This worked for me, I could be wrong on a security level. Overall, please confer with your web/system administrator for your WordPress installation.
Linux-Unix: You have to set the file/folder permissions of the /<your_home_dir>/wp-content (where the plug-in sub-directory resides) and set this to 775. The process that controls the PHP operations requires access not as the “owner” but as a “group.”
Windows: If it’s a windows operating system, change permissions to the owner and system with Read-Write (full access).
If you are unable to change this option, again, please contact your adminstrator. Good luck…