Question is pretty much as stated in the subject line, but if you want me to elaborate: I have been trying to play ARK with friends, though it seems choosing a time immediately post-expansion update was very unwise. We formerly used Nitrado with no trouble, but couldn't get our Valguero server to load our mods. Then I found this service and thought it quite promising, but encountered the same issue. Admittedly, we run over forty mods--including S+ and StructureSaverr2--but these have been working flawlessly for me in singleplayer across multiple ARKs.
Plainly, the problem wasn't Nitrado and isn't ARKServers.io, but the game itself. My personal games work great, though. What is different about servers? Why do some mods break servers, but work perfectly in singleplayer?
Please note this is not a complaint post, because I know full well that Genesis broke everything. I also know Wildcard is famously slow to address breakages they cause. This is more intended for educational and conversational purposes! That said, my crew will surely be playing here when the devs sort their darn game. :3