ORA-39165 Schema was not found in export
When I run into issues like this, I like to simplify the command as much as possible.  I would try putting all of the parameters directly in the command line and removing the parameters that are not required.  And I would use a dba user to do it.  Something like this.

expdp {dbausername}/{dbapassword} SCHEMAS=OFDAT DUMPFILE=dev_ofdat_2-1-3-0_afterbackfill.dmp