"The ERC-20 Token Transfer might have Failed (ErrCode: unable to locate corresponding Transfer event log), check with sender."
I would just like to share this.
I was trying to transfer some tokens (PIN, pincoin) to an exchange and the transaction always failed with the message above (etherscan). I googled about it and saw some links but there's no answer to the error.
I remembered EQL (Equal), they required us to left few tokens to our wallet if where going to send some to the exchange. I tried it with PIN and it worked. I don't know if this is the only answer to the error above, but it works for me even if I lowered my GWEI (1st try is 12 the next is only 4).
I hope this also works to other tokens that's having the same problem.