Invalid Email Address when (cross platform) connecting with Kabam - workaround!

[Derpo]

Just some annoying bug I stumbled upon, found a work-around, and wanted to share:

I wanted to cross platform connect my game. I've read online how its done with Kabam Cross Connect. (Just make sure to use the same email address.)
So on Epic platform, I tried to make a Kabam connection by entering my email address. That is a dutch email address ending with @ .nl (not sharing my email here of course, duh).
It always ended up with the error message "Invalid Email Address." Yes, it was correct of course, been using that email for around 20 years now.
Then I tried my @ gmail.com address. Now it worked! A validation code was sent.
Then I got a brainwave and exited that page, tried again and now with my @ .nl address. NOW IT WORKED!
So I entered my received code and yaay, it worked! I was connected.
Ok, now onwards to the other platform. Steam this time.
I started the game 1st time. Clicked the "Do you already have an account?" line and entered my @ .nl address. It failed. Every time I tried: "Invalid Email Address." again.
So I tried the same trick as before and entered first my @ gmail.com address. That one was accepted.
I exited that screen and clicked that line again and entered my @ .nl address. NOW IT WORKED! I entered the 2nd received code and could link the game I played with before.

TL;DR: If you want to cross-connect your gameplay and end up with "Invalid Email Address.", enter a working Gmail address first, exit the Kabam screen, and try again with your preferred email address. On both clients.

Not sure why my own email address was marked invalid the first times though. That's a bug I hope it will be addressed to.
I posted this on their discord server too.