You should uncheck the "Front - Can upload avatar" CAN/permission. More info here: https://wpforo.com/docs/root/members/usergroups-and-permissions/

I'd also suggest you read this FAQ: https://wpforo.com/community/faq/wordpress-user-roles-wpforo-usergroups-and-forum-accesses/

Can i just give you one here:

Username: removed

Password: removed

Please send the admin login details to infogvectors.com email address, I'll ask the developers to check the issue for you. 

website is golfonanytee.com and i can make you an account to check it out for me if you can thanks

There is a conflict with the Stranoweb Ajax Login Premium plugin not with gdpr-cookie-compliance one. 

The Stranoweb Ajax Login Premium plugin adds a disabled attribute on each Submit button, it doesn't matter does this button belongs to the plugin or not. Thus the submit button doesn't work. You should contact the Ajax Login Premium plugin support and ask them to fix this. 

Posted by: @bastbra

I see this users in the user overview, but not in wpForo. So there isn't a function to disable this inactive users (so they must set the password, but the account is already active)?

yes, the users should set the password in order to activate the accounts. You should either deactivate the gdpr-cookie-compliance plugin or disable the User Registration email confirmation option. In that case, the issue should be solved. 

Another option you can set the "No" value of the "Replace Reset Password Page URL to Forum Reset Password Page URL" option. Probably, in this case, the plugin won't have any conflicts.