There is no any issue with Gutenberg. It doesn't affect wpForo and wpForo editor. You can activate it without any worries. The wpForo editors will always be the TinyMCE, it'll not changed when you activate the Gutenberg.
In case you want to say thank you !) We'd really appreciate and be thankful if you leave a good review on plugin page. This is the best way to say thank you to this project and support team.
