If you haven't made login credentials specifically for the wiki, and are trying to use your forum credentials to log into the wiki, thats where you may be going wrong. In order to create and/or edit articles with the wiki, you must make a login/password specifically for it. The forum and wiki do not share account information/credentials.Â
I was able to log into the wiki without issue, so that leads me to believe that's where your trouble might be.
I was able to log into the wiki without issue, so that leads me to believe that's where your trouble might be.