Error Writing H.264 following update; "Accelerated Renderer Error"

Error Report

Export Error
Error compiling movie.

Accelerated Renderer Error

Unable to produce frame.

Writing with exporter: H.264
Writing to file: <filepath>
Writing file type: H264
Around timecode: 00:02:08:11 - 00:02:09:03 (At this timecode, two images overlay each other, keyframed, the bottom with gausian blur; it doesn't seem to struggle with this in the intro however, where the company logo overlays an image, both are keyframed, and the logo has drop shadow applied, and there's even keyframed text with drop shadow over it all. A bit confusing. And it hasn't struggled with this before the update, so I'm bothered.)
Rendering at offset: 128.587 seconds
Component: H.264 of type Exporter
Selector: 9
Error code: -1609629690

System Info

HP Spectre x360 15

Processor: Intel i7-10510U

GPU: GeForce MX250, driver version 442.92

16GB RAM

512GB SSD (219 free)

(Looking to upgrade this poor limping thing now that I'm working from home. It hates every update.)