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Are you using a paid version of Malawarebytes or a trial version?
Malwarebytes must have been corrupted duing the update, higher possibilities.
You may uninstall the MB and reboot the computer after that you can download and install it back and enter the license code to activate is as a paid version.
Remote assistance payment seems to be failed you can check with customer service to fix it and i can fix the Malwarebytes on your computer on remote access service.