A couple of extra instances which can be avoided by a similar check as above (making sure something exists):
SCRIPT ERROR: Invalid get index 'requirements' (on base: 'Nil'). at: common_effects (res://src/core/globals.gd:2178) - Invalid get index 'requirements' (on base: 'Nil'). SCRIPT ERROR: Invalid get index 'name' (on base: 'Nil'). at: play_animation_noq (res://src/core/input_handler.gd:1615) - Invalid get index 'name' (on base: 'Nil'). SCRIPT ERROR: Invalid get index 'rewards' (on base: 'Nil'). at: Reward (res://src/core/globals.gd:1590) - Invalid get index 'rewards' (on base: 'Nil'). SCRIPT ERROR: Invalid get index 'name' (on base: 'Nil'). at: autocomplete_quest (res://src/core/input_handler.gd:1245) - Invalid get index 'name' (on base: 'Nil'). warning - location L33 is not quest SCRIPT ERROR: Invalid call. Nonexistent function 'update_buffs' in base 'Nil'. at: generate_data (res://src/character/ch_dyn_stats.gd:161) - Invalid call. Nonexistent function 'update_buffs' in base 'Nil'. SCRIPT ERROR: Invalid call. Nonexistent function 'clear_nonstored_effs' in base 'Nil'. at: clear_nonstored_effs (res://src/character/ch_dyn_stats.gd:113) - Invalid call. Nonexistent function 'clear_nonstored_effs' in base 'Nil'. SCRIPT ERROR: Invalid call. Nonexistent function 'calculate_price' in base 'Nil'. at: update_purchase_btn (res://gui_modules/Exploration/Scripts/ExploreFullSlaveInfo.gd:37) - Invalid call. Nonexistent function 'calculate_price' in base 'Nil'. SCRIPT ERROR: Invalid call. Nonexistent function 'calculate_price' in base 'Nil'. at: update_purchase_btn (res://gui_modules/Exploration/Scripts/ExploreFullSlaveInfo.gd:37) - Invalid call. Nonexistent function 'calculate_price' in base 'Nil'. SCRIPT ERROR: Invalid get index 'is_stored' (on base: 'Nil'). at: eff_stack.clear_nonstored_effs (res://src/classes/eff_stack.gd:146) - Invalid get index 'is_stored' (on base: 'Nil').