Unsupported Video Driver: Nvidia GeForce 750M

I am sorry to tell you this, but that GPU is now almost completely obsolete, according to Nvidia itself. You see, Nvidia had announced back in March of 2019 that all Kepler mobile GPUs, including yours, is being EOL'd after Driver Branch 418. Driver version 425.31 is merely a security patch to the last significantly revised driver in the 418.xx series, which came out near the end of March of that year. Unfortunately, Nvidia updated the mainline driver set to Driver Branch 430 the following month, which now no longer supports any Kepler mobile GPUs. And Adobe's new version policy is to now require the mainline Nvidia driver branch that was no more than two major revisions old at the time of the major version's release of Premiere Pro, which happened to be Driver Branch 430 (Nvidia had updated the branch drivers twice in between, to 435.xx and then 440.xx). Meanwhile, the Kepler mobile GPUs remain permanently stuck on Driver Branch 418.xx, and will go completely EOS (End Of Support) outside of archived drivers at the end of this month.

As a matter of fact, the GT 750M is actually based on a GK107 chip that first debuted in the desktop GeForce GT 640, later boosted into the GTX 650, way back in 2012.

As far as I know, the latest PPro has dropped full support for older hardware

https://community.adobe.com/t5/premiere-pro/premiere-pro-2020-and-system-compatability/td-p/10901775?page=1