I'm playing the Divine Journey modpack, 1.7.10, everything was working fine, but one day when I tried to load my SP world, the game just crashed and said: "The game crashed whilst exception in server tick loop Error: java.lang.NullPointerException: Exception in server tick loop" Does that every single time I try to load my world.
When I tried to load up a backup I can get into the game, but when I try to open to achievement book it says "No achievements found - check file encoding", when I try to copy the file from the original world or copy the text, it resets and does the same thing again, when I set it to read-only, it crashes once again and says: "The game crashed whilst ticking entity
Error: java.lang.ArrayIndexOutOfBoundsException: 0", then resets the file.
I can send crash reports if you need them.

crash-2018-02-22_19.34.08-server.txt
crash-2018-02-22_19.43.29-server.txt
crash-2018-02-23_14.21.53-server.txt
crash-2018-02-23_14.34.58-server.txt
crash-2018-02-23_22.28.20-server.txt
crash-2018-02-23_22.40.37-server.txt
crash-2018-02-23_22.40.56-client.txt
crash-2018-02-22_18.55.09-server.txt
crash-2018-02-22_19.07.46-server.txt
crash-2018-02-22_19.17.48-server.txt
crash-2018-02-22_19.27.33-server.txt

These errors are coming from BetterQuesting, not SA.