LOL... it says right there: "64 tx-size"
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Ftalkimg.com%2Fimages%2F2023%2F11%2F15%2FzpcAv.png&t=665&c=vaT92QSfVNYXLA)
You are attempting to create a transaction that is 173,354 bytes!!
![Shocked](https://bitcointalk.org/Smileys/default/shocked.gif)
That's around 760x the size of a "standard" transaction (226 bytes)!
![Roll Eyes](https://bitcointalk.org/Smileys/default/rolleyes.gif)
I think the limit is something like 100,000 bytes (but don't quote me on that). I suggest you maybe cut down on the number of inputs you're using to send this transaction.
Trying using the "Coins" tab ("View -> Show Coins") and selecting a couple of hundred inputs at a time and breaking your transaction up into say 10 different transactions.