Cannot connect to vatsys using ethernet, only using wifi

When I connect with Wifi to vatsys, everything works fine, but with my ethernet cable, vatsys starting takes foverer, and on the connection panel, when I click on connect, vatsys freezes, then connects for a few seconds and automatically disconnects, showing an invalid cid/password error, when my credentials are correct, because I can login to my.vatsim.net with the same credentials.
I reached out to discord, but they told me that I needed to figure it out by myself, but still cant find a solution