I had a similar issue, it was caused by “Global Default Server Game Mode” being “none” by default. You can find the setting in Project Settings > Maps & Modes > Default Modes (This particular setting is hidden under the arrow).
I had a similar issue, it was caused by “Global Default Server Game Mode” being “none” by default. You can find the setting in Project Settings > Maps & Modes > Default Modes (This particular setting is hidden under the arrow).