Error with Tradier orders

I am getting errors when trying to fulfill trades with Tradier.
Can I get a more detailed explanation of what's happening here?

Thanks
Tony

I resubmitted the failed orders and most of them filled.
Maybe it was just a glitch?

Is this a tradier-side problem or a P123-side problem?

Tony

Tradier sends us that error on occasion. Our Tradier connectivity service only retries order submission on connection failures on our end.