Transaction with highest fee, but stuck, what did I do wrong?
The hourly average fee when this question was posted was between 9 and 10 Satoshi per Byte (sat/B).

The latest TX's that I just randomly checked all had 10.03 sat/B fee which is higher than the 4.5 sat/B that you sent.

Transactions are at a hourly peak right now. Wait it out and it'll probably go through in the next couple of hours as the mempool empties.

I just noticed your TX went through and has 3 confirmations from the time I started replying to now. So I guess this is a closed issue.