Now that's a useful error message.
The error "Script failed an OP_EQUALVERIFY operation" means that the server that received your transaction failed to verify your input(s)' script.
In other words, the signature is invalid.

I really wonder what kind of input you're trying to spend.

Useful info for others:

• Since the first transaction has a very high txn size, his address must be one of those old high-value addresses that received lots of dust transactions.
• His first screenshot slightly shows that he's sending three-digit bitcoin amount (or more) which supports the idea above.