Me too. I haven't been able to use Remote Package Installer (RPI) yet, every time I open it on my PS4 dashboard, it crashes almost immediately with an error CE-34878-0.
Chain of events (I'm including from before jailbreak to issue):
Followed Modded Warfare jailbreak tutorial for PS4 5.05. Loaded Hen payload (al-azif v2), debug>pkg installer>Installed a Ace Combat fpkg to internal, verified it worked, set up external with app2usb.ini, loaded app2usb payload, it said it worked, but when I unplugged the external the game still worked, so app2usb didn't do what it was supposed to do.
I installed remote package installer and ps4 xplorer to internal. I load app2usb payload and this time it does transfer both apps and ace combat to the external. I run ace combat, it works. I run ps4 xplorer, it works. I run RPI, it opens for a second and then shows error CE-34878-0.
I've deleted RPI through storage>apps, and deleted RPI's file folder using ps4 xplorer. I've reinstalled RPI (always clearing cookies, cache, history before loading hen and goldhen payloads) into the internal and it still crashes. I repeat the same process and tried reinstalling to external with app2usb, and it still crashes as soon as I open it.
Where am I going wrong?