I'm getting the following message when loading the game with creative mod enabled.
Error while running setup for entity prototype "creative-mod_creative-lab" (lab). Entity must produce no item result result or mine to an item that isn't hidden when next_upgrade is set.
This was an incompatibility with the "Built-in-Beacons" mod.
I've fixed this for the 1.3.3 update and asked the mod author if this behavior is intended.
I'm getting the following message when loading the game with creative mod enabled.