You open TikTok, try to buy coins, send a gift, or promote a video—and instead, a message pops up: “Payment failed.” It stops you from complet...
Fix Error 400: redirect_uri_mismatch in OAuth and OpenID Connect Logins
You click “Sign in with Google” or another provider, and instead of logging in, you’re met with Error 400: redirect_uri_mismatch. Annoying, rig...
How to Fix Error Code 4 “This Video Is Unavailable”?
You click play, and instead of your video loading, you get a message: “This video is unavailable. Error Code 4.” It stops your video cold, wheth...