I have configured Firebase/Firestore, but Firestore return this error ever:
[Firestore][I-FST000001] Could not reach Firestore backend.
I'm using Swift 4 and Xcode 9. Any idea?
This issue has now been fixed in Firebase SDK 4.10.1
Unfortunately I experienced this bug yesterday for Firebase SDK 4.10.0 and have reported it directly to one of the Firebase engineers working on the iOS SDK. For me, I only had this error when the user is not authenticated. As soon as the user is authenticated, the problem went away.
For now, I'd recommend sticking with Firebase SDK 4.9.0 until they fix it in the next update.