I am getting an error check.state is missing when trying to sign up

Please include the following information in your post:

SDK: express-openid-connect
version: 2.5.2

Whenever I try to sign up for a new account from the sign up on Universal Login, I get an error that says: “check.state is missing”.
I did see that others have encountered this problem before me and I tried all the fixes that are recommended, but none of them seem to work for me.
It happens only when trying to signup and happens almost all the time.

I am not sure what to check anymore.
Any help would be just wonderful!

Thanks in advance.