Modpack version
1.56

Can the issue be reproduced?
unknown

Logs

2019-03-09-6.log

Issue
crash after loading the game
Launched Version: 1.12.2-forge1.12.2-14.23.5.2781
i did not added and deleted any mods its just crashing after downloading the modpack first time

Re-download :)

its not fair its my 5 th downloading time please read that log its abaut the advanced rocketery

I'll have a look this evening. I'm guessing you're actually crashing while entering your world?

You're using Forge 1.12.2-14.23.5.2768 not 1.12.2-14.23.5.2781 as you should.