Error while trying to open minecraft PO3 through the launcher


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Whenever I try to run Project Ozone 3 through the Creation Reborn launcher, it gives me the error: " The game is running. Please wait. Unrecognized VM option 'MaxPermSize=256M' Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. Process ended with code: 1 "

Please help :(