If your only user profile is a temporary guest account or a local offline account that was never connected to Sony’s servers (even briefly), PSNPatch will see zero valid PSN tokens.
I installed PSNPatch hoping to finally use my modded PS Vita online without updating the firmware or getting banned. The plugin itself does what it claims – it spoofs version checks and disables certain telemetry. But the real hurdle is the dreaded error. psnpatch no valid psn account