World Builder should always use RelicCoH2.module. Any other .module file having upper position in alphabetical order than RelicCoH2.module will override RelicCoH2.module.
To avoid this, you should run World Builder with following launch options:
Code
"C:\Program Files (x86)\Steam\steamapps\common\Company of Heroes 2\WorldBuilder_CoH_2.exe" -mod RelicCoH2
Path to WorldBuilder_CoH_2.exe might be different in your system.
What will this do? It will force World Builder to use RelicCoH2.module.