These alarms are not difficult to fix, but anyway are not important either ...
INTERNAL ERROR: HierMesh: Can't find chunk 'Water1_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water2_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water3_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water4_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water5_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water6_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water7_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water8_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water9_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water10_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water11_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'Water12_D0'
INTERNAL ERROR: HierMesh: Can't find chunk 'RADL12_D0'
Probably either Ki-44-II-HEI or Ki-21-IIb, or both, have missing TGAs because they were made from other planes, and their hier.him wasn't cleaned by the modder ...
Fix:
1) Take any TGA file, as small as possible (1 ko for ex)
2) Rename it: Water1_D0.tga
3) Put it in the plane 3D folder
4) Do the same with the other missing TGAs ...
Now you won't have the alarms anymore ...
But this is not the cause of your crash ...
I believe the cause is:
java.lang.NoSuchMethodError
at com.maddox.il2.ai.air.Maneuver.update(Maneuver.java:2717)
But I don't have the necessary skills to help you any further ...
There will, for sure, be a java guru that will read your post and fix the bug for you ....