Basic use of BOM .odt templates

Does anyone have any knowledge on how to use .odt templates? Tried to use one and have no luck. Placed under boms folder in documents, enabled that function in modules, found generate button but only get code in final downloaded file, without any information. Is that .odt file wrong or system is not working. Does anyone have working example? even simple no fancy multilayer BOM’s.

V 14.0.0.2