Hey!
I ran into the same issue on a few of my websites running CleanTalk. The patch fix works great, so thank you!
However, my websites were all already running the most up to date version of CleanTalk available, version 6.50.1, and the link you posted to the CleanTalk website allows you to download the same version, v6.50.1. It seems the only way to get the patch fix you mentioned is to follow the Github link you posted, which links to an updated release from 2021, so the patch fix is not even obvious on if I go to your Github.
I’m sure you can see that this is a bit confusing. I understand this may be intentional if you want to wrap the patch fix in a new version or something, but it is frustrating as an end user. Would you mind pushing the patch fix so it is easy to apply to all WordPress sites running the plugin?