like two of mine via GST, don't believe vendor tech support that you don't have to do anything unless the FBAR Feds send a letter. It means "rejection". Apparently there is no official grace period for resubmitting, but you can select "amended" and resuubmit. GST and I assume the FBAR schema, doesn't provide a place for an explanation.
If you use the govt's FBAR site to efile FIN114, and you submit a batch of FIN114's with some of them prepared incorrectly, they would give you a different error message that's similar to the above one, but would tell.
btw, for the 2017 year I used GST for some FIN114's and UT for some. I did get "conditional acceptance" on one via GST. Didn't amend. Never got a letter. One of the bank accounts was missing a country code. But it was obvious that the address in Montreal was for Canada.