Still possible to start from scratch?

[ForgottenMemory]

I am not really sure what the problem is. I had to move to another android ROM and my my back up of the EN App’s data is somehow broken.
I’m getting connection errors but I am honestly not sure what exactly is causing them.
I am not very advanced in coding yet and wanted to start figuring out how it works to maybe eventually be able to fix bugs but now I can’t even get the game to redownload the data (using certificate, DNS change, and apk from this repo) the screen just stays black and I’m apparently getting 443 errors.
Is the supplement server this used now gone or something? And if does somehow know where I can get the missing data to make the app work again? I‘m really devastated at this point. (I have root so I could basically just copy paste the data if I had a complete copy, if necessary.)

Edit: I found that my older backups from more than half a year ago at first would not restore either but after trying around for a bit I finally got it to restore the data. But the strange issue of 443 errors remain so I doubt the issue lies with anything but the local server (it does seem to connect but only return 443 errors). I’ll need to try to investigate what causes this… I’ll leave the issue open for now as I can not for sure say that the data actually works and also still don’t know if a redownload would be possible.