When used simultaneously with Quality Effects Fixed, the following error occurs. This issue can be resolved by adding “qef_ignore = true” to the entity prototypes “umr_amplifier_entity,” “umr_core_entity,” and “umr_output_entity.”

Error while running setup for entity prototype "umr_amplifier_entity" (assembling-machine): Module inventory size is > 0 (or module slots count is affected by quality) but no effects are allowed. This makes no sense.
Error while running setup for entity prototype "umr_core_entity" (assembling-machine): Module inventory size is > 0 (or module slots count is affected by quality) but no effects are allowed. This makes no sense.
Error while running setup for entity prototype "umr_output_entity" (assembling-machine): Module inventory size is > 0 (or module slots count is affected by quality) but no effects are allowed. This makes no sense.

will take a look, its proly a small fix
edit: https://mods.factorio.com/mod/QualityEffectsFixed i had both mods and dont got the crash, its proly another one.
send your factorio current log, i can track it down. You can open with txt note pad
C:\Users\Administrator\AppData\Roaming\Factorio\factorio-current.log
I checked their codes, and honestly its on their side, they need to refine their function that apply quality_affects_module_slots to literaly anything thats a machine, maybe ignore machines that have 0 modules from start, cuse it will be basicaly cheating

Thank you for your advice. This issue was actually caused by QualityEffectsFixed, and has been permanently resolved by the author. I apologize for reporting it to the wrong mod.

grats its fixed, you fine to contact me, im glad to track crashes that are not even caused by my end.