The API server setting is buried under the Advanced setting of your settings under your profile page. But if you haven't set it, it should be default to https://api.hive.blog and falling back to https://anyx.io if it has any problems. We haven't had any issues reported with api.hive.blog recently. There was a certificate issue that affected https://anyx.io recently, I've been told.

If you're experiencing this problem currently, you can go to the advanced section and try changing your api server. But I asked around, and no one else has reported a similar problem.