The corrupted nether is an addon that completely corrupts the end. The nether has taken hold of it and the withering disease has caused chaos in this realm. The void is now not only a husk of what is too far to reach but now the burning ashes of the ancient holders.
Select version for changelog:
Changelog
-new weapons
-new bosses
-cutscenes and storyline
-new dimension
-optimization and bug fixes
-terrain feature changes
-structure changes
-altered dodge
-altered combat mechanics
-new items
-better portal for corrupted nether
-survival friendly
All Stonebrick things are retextured (Which is certainly lazy)
All end things are retextured (again.. very lazy)
Not being hateful, just telling the truth.
Here is a solution: when it crashes, go to the editing part of the world on the menu, deactivate the addon, leave the editing world screen, then re-enter the editing screen, and install the pack again.
This should force the game into the end for you, and you should be able to see all the features.