the transaction was rejected by network rules
16: mandatory-script-verify-flag-failed (Signature must use SIGHASH_FORKID)
this error means you have created a "bitcoin" transaction and now you are trying to send that transaction on "bitcoin cash" network. they obviously reject it because it is invalid on the other network.
- install the latest version of Electron-cash 2.9.4
- import your private key there and try recreating the transaction and sending it.