I can't save or load saved game

[soccerdon1981]

I'm absolutely lost here.

I'm running Windows 10, 64-bit
I'm on PPSSPP Gold v1.4.2

I've already copied my saved games from my PSP to this directory:
C:\Users\blah\OneDrive\Documents\PPSSPP\memstick\PSP\SAVEDATA

The saved game is noted as ULES00636CM2007-8, I don't know if this matters or not.

I'm trying to play Championship Manager 2007. When I try to load the save, I can see the saved game in the selection list to choose which load to actually load, but after selecting the saved game to load I'm given the error: "Load failed! Check Memory Stick and please try again"

I've been through the forums for the past hour or so and couldn't find a thread that resolved my issue. Google results are also unhelpful.

I've tried starting a new game and then tried saving the game, but I'm given this error: "Save failed! Check Memory Stick and please try again" [even though I can see a new SAVEDATA file appear in my SAVEDATA folder ... like it's registering the save but not really. I don't know.]

So, two questions:
(01) How can I load my saved game successfully
(02) How can I SAVE my game successfully