Reproducing from a vanilla install of minecraft 1.14.4:

• install forge 28.0.32
• place Apotheosis-1.14.4-2.1.1.jar into the mods folder
• run the profile forge generates
• game loads up as expected

• install forge 28.0.34 (or any more recent version up to 28.0.40)
• place Apotheosis-1.14.4-2.1.1.jar into the mods folder
• run the profile forge generates
• game crashes on start, providing a launcher log with exceptions that I don't understand:

launcher_log.txt with the errors:
https://gist.github.com/kemus/79d8d8763789a2c53d362e93eab2bcde

investigating further, this does not seem to just be an issue with your mod, this forge update also broke
EnderBags-1.14.4-4.1.0.jar

Unusual... I'll go poke around at it.

Alright, I've tested the 93 mods I've downloaded, and this happens with 5 of them:
Apotheosis-1.14.4-2.1.1.jar
EnderBags-1.14.4-4.1.0.jar
morelights-1.3.1.jar
RGBStone_1.0.jar
ruins-1.14.3.jar

Seeing as it happens with other mods, I'm betting it's a regression on forge's part, so I'll write up this issue for them too.

If you want to try to fix how it happens with your mod, it might be worth looking at what your mod does similarly to some of the others I listed? Not sure if that'll be useful though.

I'll just stick with using forge 28.0.32, though, since I'm really excited to try apotheosis out :)

If you want to try out apoth you probably shouldn't have any excitement for the 1.14 version, it contains 3 items and nothing more.

Oh, welp, I guess I can wait patiently for the update to be out of alpha (I didn't know it wasn't complete) 👍

(or maybe I'll go ahead and download the 1.12 versions of all of the rest of my mods... hmm...)

Hey, I don't know if you're still looking into this issue, but it was indeed a forge bug, and one of their devs is working on fixing it now: https://www.minecraftforge.net/forum/topic/74149-crash-on-launch-with-certain-mods-starting-at-forge-28034/

(so I don't think it's worth spending any of your effort trying to fix it on your end)