Extra Golems not spawning in 1.16.5

[walker40061]

Extra golems are not spawning naturally. Villagers aren't summoning extra golem entities. I even tried changing villager summon chance to 100 but still only iron golems are spawning. After that I tried manually creating the golems, and successfully created a diamond golem BUT only once, after I created that one diamond golem I couldn't create any more golems. I don't know why this happened. So I Removed all other mods and their configs to check if there was conflict with some other mods, but the problem still persists.
Please help.
BTW love your works.
Thanks in advance

[walker40061]

2023-10-08-1.log.gz
2023-10-08-2.log.gz
2023-10-08-3.log.gz
here are the logs if needed

[walker40061]

Update.
So I tried to remove version 1.16.5.2 and installed 1.16.5.1 instead. I was able to manually create golems but villagers still didn't summon extra golem entities. After that I re installed version 1.16.5.2 and Viola! the game crashed. It said java.lang.NullPointerException: Rendering entity in world
Here's the crash report.
crash-2023-10-08_19.54.20-client.txt