Big green stripe after import to lightroom

Such artifacts are typically indicative of failing hardware: bad blocks on a memory card or hard drive, a flaky USB cable or USB hub, a flaky card reader, failing main memory.

It could also be an out-of-date graphics driver, though if it's only occurred on one photo, that is less likely. But as a first step, update your graphics driver by going directly to the manufacturer's web site:
https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html#solution-4

(It's good hygiene to do that  in any case.)

Use File Explorer to navigate to the memory card and open that JPEG in the Photos app directly from the card.  Does it show the stripe?

If not, copy the file to your local disk and open that copy in Photos. Does that show the error?

As a larger test, shoot several hundred test photos (raw + JPEG pairs) and import them into LR and see if the error occurs again.