Game crashed on startup when having Endergetic installed with End Phantasm. Looks like its a compatibility issue when having multiple end mods installed if there is Sinytra's Connector in the mod list. This issue is already mentioned here before.

Latest log: https://pastebin.com/1WSjc48L

I've tried launching these mods without Sinytra Connector. The game crashed, it's an incompatibility between these two mods.

From what I can tell, this issue is on their side, and they said they could fix it.