I just bought avast cleanup and when i enter the security code, it just says error 232. Anyone know what to do?
Submit a ticket: https://support.avast.com/Tickets/Submit
Try again later… 
Sorry that the error message is not helpful at all in this case. The error code 232 indicates the activation code was entered in the field for Avast Antivirus premium products. Scroll down the same screen where you entered the activation code and you will see that Avast Cleanup has an activation code box specifically for the Cleanup product subscription. The code you purchased will work when entered in the Cleanup section there.
See https://www.avast.com/en-us/faq.php?article=AVKB205 for specific steps with screenshots.