vSro l FW Command Post Problems

I'm having a problem with FW Command Post. When I try to build up a command post, after whole building process command post just disappears, it's just not able to build it. When post is being built you can see blinking and kinda transparent fragment of the post, but only in building process.

Same issue, did you find any solution?

Check structures at: _RefObjCommon, _RefEventZone, _SiegeFortressStruct

Ensure about them from a clean database.

Please make sure your fortress is currently owned by a guild, otherwise you are not allowed to build command posts.