BIP3211
Severity
30 : Severe errorMessage
Error in parsing FORMAT expression '<insert_0>', parsing failed at '<insert_1>' because of malformed exponential pattern, must have at least one '0' in the exponent and at least one '#' or '0' in the integral or mantissa.Explanation
The FORMAT expression was incorrect, and must be rewritten.Response
Look at the reason given and the point at which it failed to determine what has gone wrong. It is most likely an incorrect character used.