using pkg2zip -l zRIF_key_here file.pkg . This outputs a decrypted app/ folder.
The Legacy of Mortal Kombat 9 on PS Vita: PKG Installation, Performance, and Preservation Mortal Kombat 9 Ps Vita Pkg
./psvpfsparser -i output -o output_dec -f cma.henkaku.xyz -z YOUR_LICENSE_KEY using pkg2zip -l zRIF_key_here file
This is a generic application crash error. It usually indicates corrupted game files or a plugin conflict. Try disabling custom graphics plugins or re-transferring the game files. Mortal Kombat 9 Ps Vita Pkg