Which social network is giving you this error? Are you still facing this issue?
I no longer receive the 400 error.
I don’t remember which network the error occurred on, but I always test on home wifi.
Today I tested on wifi and 4g, in both I had the behavior below:
Accessing the “My Account” screen.
And start the login, after selecting the desired account, and log in.
At the top of the browser “the bar that shows the page load” kept reloading very quickly, as if it was repeatedly trying to redirect back to the “my account” page.
But it never completed the redirect.
Same behavior as I mentioned in another question.
Could the 400 error that appeared earlier be related to this?
Maybe you tried to redirect so many times that the Browser or Server refused the attempts and presented the error instead of just the white screen?
If you drop an email at support[at]heateor[dot]com regarding the same, we would be able to check what’s wrong.