When electronic filing the 1095-B or 1095-C forms, I have seen this error twice this year:
System Authorization Error – SysError – 2
Header-005 or Header-006
Publication 5165 says:
Verify that the Transmitter Control Code (TCC – included in the ACA Business Correlation ID) is valid, in the “Active” status, and authorized to transmit the Information Returns included in the transmission (Note: If the transmission is rejected with Header-005 or Header-006 (SysError 1 or 2) wait 48 hours, then retransmit.)
This leads to the big question, is the TCC that you used in “Active” status? The data file and manifest file are probably valid and well formed. Log into IRS E-services to check the status of your TCC.