Thanks to map reports on NA server I was able to find and quickly fix a bug that was completely blocking the ability to research and build traps.
The fix is already online and I took advantage of the situation to make a couple of traps invisibile while they are not attacking. This should spice multiplayer games a bit.
o Gas traps and scourgeling nests are now hidden until they start attacking
o Possession spell now uses a different camera depending on the type of the possessed creature
o Fixed a bug that was blocking traps research
o Fixed a bug that could cause the stop of mouse cursor changing