After completing the questline and facing the founders I noticed there were two dialogue options to challenge them. One of them would always say I was low rank. The other option allows me to challenge the founders. I went to Murzaga but she only had one option so I do not have the opportunity to challenge her. Either the bug is just that it isn't recognizing my rank or there is a bug with the other founders where I am not high enough level but they let me challenge them.

Is rank 7 master or is it rank 8 not sure if goes that high played 4 matches and not much movement in the bar so not sure. If have to get to 8 then the other founders are bugged to where was able to challenge them.