Firebase Cloud Firestore throws “client is offline”

Question

About 3 out of 4 times loading the page I get this error from the firestore client SDK (web). This slows development down tremendously. Auth, Realtime DB and Storage work pe

Answer 1

For me, the same error happened when

1. project_id is wrong
2. port for emulator is 8081 instead of 8080. (when port was 8081 the emulator was working well, with UI opened normally and so on but the error kept showing. I fixed the problem by changing the port back to 8080)

The error message is very misleading.