I Can't Choose My Archer Class

So, I have an archer class on the server, which is level 52.
The last time I have played wynncraft was, I think, in about either early 2016 or somewhere in
2015. I can choose the classes like Assassin, Mage or warrior, but I'm only getting the error on
my Archer.
I did record a video, showcasing the error that I'm given.
watch?v=H3vJn_rXTKw <- this is the watch thing that you have to put after the slash, since I can't post links yet.
Additionally, I wanna say that I played before the armor gave +health and all that.