The emulator ensures that the file has a valid entry point (the first instruction executed when the game starts). Corrupted or incorrectly dumped workbins often lack this, causing a verification failure.
Vita3K does not run raw, unencrypted game dumps. Instead, it requires specific decrypted file formats. This is where the enters the conversation.
If you're drafting a post to help others or share a "verified" status, here is a template:
Inside that folder, ensure you have the sce_sys folder and the app files.