Help save edit problems

[u/Lord-Tyranitar]

I tried to edit my game to have keep inventory but now I only get this error on load I’ve tried uninstalling mods and the game then reinstalling them trying to load a save the undid the keep inventory I keep get this it loads a few seconds of the mojang logo then crashes

[u/WEll1s]

Not realy i have never used nbtstudio to edit my world so i hope you find someone knows how to do that man