Having trouble recovering multisig funds after winning dispute on Alphabay.

After winning a dispute with alphabay I received their market private key which should allow me to retrieve the funds stuck in the multisig wallet that was created for the transaction. After carefully following the guide posted here by /u/Alphabay_mod I continually get stopped with an error while broadcasting the transaction on coinbin. The error that it shows is: 16: mandatory-scipt-verify-flag-failed (non-canonical DER signature). Has anyone had a similar problem while trying to recover funds in multisig or know what would be causing this type of error in a broadcast?


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