Sure fire method TLDR: august 29th update - enable kernBypass with app installed, Open GT, let it quit. Delete app, run iCleaner & repspring after, re download GT and open it will work now.
Did u download cURL? I’ll go through everything I did in order as best as I remember so maybe you can get it to work (disclaimer: I have no idea which part of the process got it working because at 1st it wasn’t for me and I kept trying different sht). IPhone 6s 13.6.1 checkra1n jailbreak. You’ll need this source ‘apt.cydiakk.com’. Get ‘iCleaner’ & Abypass from there. I also had both kern and abypass from that source that worked on everything together except for gaurdian tales. Enable both Abypass and kern (the kern from the posters link is the only one that’ll work) for guardian tales. Open the app and after it quits or whatever happens, disable Abypass but leave kern enabled. Remove app from background and delete the app. Now run a clean in iCleaner. Reboot phone, re jailbreak (mine is semi un tethered) & then Download gaurdian tales again. Open and it should run, if not reboot and disable/re enable kern before opening GT for th 1st time after downloading (meaning delete GT iClean again reboot again download GT ect^).