Hi @danielvdell,
I think your forum is totally crashed. These are not a simple issues to fix. You've done something wrong or it fully conflicts with some other plugins. I'm sorry but this is not a case to fix with a simple question and answer. I' have no idea how did you get this kind of problems. If you want us help you please send admin login details to support[at]gvectors.com email address. Or if you don't have important information in your forum please fully Uninstall (not just deactivate) , then delete wpForo plugin and search and install it again.
It seems something is changed in myCRED plugin recently. Please open a support topic on gVectors Theam support forum to let them know and update the addon.
https://gvectors.com/forum/official-wpforo-addons/
