Most of the cases here are about bcgame.....i think the bcgame should be serious about such situations and help users out
And i saw someone named holydarkness has helped almost all of the user. If you are seeing this @holydarkess please help me out also.
This is simply because BC.Game is one of the largest crypto casinos out there and therefore has a large user base ... the more people play, the more often/frequently problems of various kinds can occur.
A shot in the dark ... Have you already tried logging in with a different browser (or with a browser instead of an app)? Not that the error is caused by a broken browser session/cookies/... or something like that.
I might be wrong, but despite the above provided explanation about the reason of error 4001, experience from past cases told me that error 4001, that persist that made players such as OP have to raise a thread here, is not something that can be cleared by clearing cache or different browser.
Most likely than not, it's imposed upon the player because BC needs to check credentials of the player. Be it because they find something suspicious that warrant an investigation, an access from restricted teritory, or simply to reset and prove ownership.
OP has sent mail to support team and I've nudged my contact about OP's situation alongside with his UID last night. I think all we can do now is to wait until I hear back from my contact and see what to do from their feedback.