The client nearly always disconnects because of data sync error if shroudOfDarkness is there (it worked once somehow).
29215: Frame: 0 :: Glest::Net::ServerInterface::dataSync
29215: Frame: 0 :: DataSync Fail: UpgradeType 183: energy_compression of FactionType: magic
29215: Frame: 0 :: DataSync Fail: UpgradeType 184: energy_sharpening of FactionType: magic
If I try to load Shibboleth two UpgradeTypes fail for it too. It should be the same since I copied the files and it was working before adding the member.
Edit:
I set the same data dir and it still has data sync fail, even after removing shroudOfDarkness.