Error message when exporting an MP4

Hi all, I have a large project I wanted to export as an mp4 and exported it straight from Premiere.
Came back a while later, and saw this error code message that I haven't seen in any other support
posts on Google. What could be of issue here?

My PC setup is as follows:

CPU: AMD FX-8350 Eight-Core

GPU: Nvidia GeforceGTX 970

Motherboard: ASUS M4a89GTD-Pro/USB3
Memory: 16 GBs DDR3

Many thanks for any who can assist.