Error has happened bug?

As the title suggests it, I have been receiving a pop up that says “An Error has happened” every time i attempt to do the following:

  1. Create a custom game
  2. View Decks because this is via the Custom Game button
  3. Send challenge to my friends
  4. Friends sending me a challenge
  5. Joining public Custom Games
  6. Using a different WiFi source

I have tried resetting my password, refreshing the browser, logging in and out, changing browsers, and changing laptops but the result is the same. I have even created a new account which has worked for a week and then the same issue happens AGAIN. I have no way to fix this and hope someone on this forum has encountered this issue. Please advise if possible D: