I just hacked my vita amd have this error now, but only with vpk i got from my PC, the ones downloaded with VitaDeploy worked perfectly. I have tried with other VPKs
GitHub - MuxaJlbl4/Awesome-PlayStation-Vita: List of awesome stuff for PlayStation Vita
PS VITA game dumps : Free Download, Borrow, and Streaming : Internet Archive
PSVITA VPK (Alvro Files) : Aitus : Free Download, Borrow, and Streaming : Internet Archive
Release: RetroFlow-Launcher 6.0 for PS Vita - Wololo.net
Need help trying to find a vpk of god of war collection. (also having issues trying to get it on pkgj) : r/VitaPiracy
Download The Legend of Dark Witch PS Vita VPK | Dark witch, Witch, Anime
Terraria PS Vita free to download on PlayStation Plus
Super Hero Generation PS VITA VPK (MAI) (JPN) Download - Ziperto
PSV ROM & VPK - PSVita Game Download for Console
VPK Files Archive List Collection for HENkaku on a Hacked PS Vita | PSXHAX - PSXHACKS
Download] FIFA 22 mod PS vita VPK / MAI / NoNpDrm (Latest update) - Wapzola