Hi there, I found the Imcompatibility of spears and the mod Mo' Enchantments, and here's the bug report:
crash-2020-07-24_11.41.16-client.txt

By the way, it doesn't make sense logically that I press b to open the backpack and inventory, but I have to press e or esc to close this GUI instead of b. Don't know if you can make one b to open/close the backpack GUI?

Looks like an outdated version of MoEnchants, see Author response here: https://gitlab.com/biom4st3r/moenchantments/-/issues/30