my server has been crashin on startup everytime i use certain modpacks. its modpacks like mc.eternal, enigmatica 2 (not expert) and ftb revelation. there are always errors in the log of a modded game but most dont cause any problems. still i cant find any errors that could possibly cause the server to just stop or actually crash. a few example logs are: https://mclo.gs/78jLSgp and https://mclo.gs/vuXtqqn. its hard for me to believe that the server stopt because it took to long to load or that there is a problem with the pack. i have been told before that every pack that is supported on aternos has been tested to provide the best playing experience. that also the reason there are not that many modpacks supported at this time and why not all modpacks are always up to date. take all the mods 3 for example, its not supported while 1,2,4,5,magic and lite are all supported with the given reason that atm 3 isnt optimized enough. therefor i would love some help to getting there modpacks started and if that is actually impossible on your great service maybe some explaination on why it doesnt work and what i should watch out for when trying to pick a modpack to play so that its.. you know.. actually able to start up 
a big thanks in advance for every1 trying to help me! 
-lars1999vk