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Yupp exactly that. You need to install it.

Yupp that's the reason. Try installing overb0ard and expanding the memory limits for the given process, and as Rook said, there's a looooooot of results. That means it'll be a lot of toggling before you can find your value.
 
https://github.com/Doregon/overb0ard

Yes the binary is probably not compatible with your device. You should try and find a version that works for you. Which one are you using right now?

The game uses a custom encrypted format fort he gllobal-metadata.dat as you've probably seen. I highly suggest you try to debug the game until the actual call is made to open the file (most probably via fopen) and then try to work your way from there. You should be able to be able to dump it at one point from the memory it is loaded into. Another great way for filtering out where it could be would be to
 try and find global-metadata.dat's magic bytes (the bytes that begin every file of its kind. You can try and download multiple random Unity games and analyze them and build from there) and then searching for that sequence in memory and dumping it from there.
 
Good luck!

You can if the hack isn't outdated.

The hack is outdated, patched or just simply not working. Ask the owner to upfdate it to the last version.

The repo can't be found. Be sure to have the good http:// or https:// or no typos in the address of it.

There is a lot of Tutorials coveringARM hacking. You should check them out.

Install NotTodaySatan from Cydia and messages is in /Applications/messages.app or something

Filza won't work? Try SFTP to self.