When this plugin is enabled and fake Region is set to "Debug Type I" (only this one) every PSX game will result in message:

"The game could not be started (80000004)"

No such error appears when I set Debug Type II or Disabled.

Minor glitch one can say, but i don't use Extra link and without it it looks cleaner to me.

Now I'm using 6.20 PRO-B9 with Permanent Patch but it was the same in PRO-B8.

Are you using the POPSLoader Plugin? Since I only get this certain error if I use POPSLoader. Also very minor since I only have 2 PSX games on my PSP and they both work under Debug Type I Region.

Yes, this error appears only when POPSLoader plugin is enabled.

Then don't use Debug Type I ...

It must be a problem on the OFW.