WARNING! Until a fix is put in, you will have to make Plane of Knowledge instances to craft safely. In public zones, the first player to touch a Crafting Station after server reboot is basically gaining full ownership of that station. He can leave, run around, buy stuff from merchants, come back and use it again. Any other character that decides to walk over and try to use it gets their UI locked, items eaten, along with a message "Error: Server does not recognize the Crafting container you are attempting to use" Creating a PoK instance will spawn fresh stations, just do not try to use the same station on multiple characters for now.
You can start the Crafter's Guild quest by hailing MacGuyver in the Nexus, and collecting the necessary items.
Information on the Crafter's Guild Quest is available on the Official EZ Server Wiki's Crafter's Guild Guide.
There is also a fantastic visual guide put together (PDF format) by Reddwarf that can be viewed here
Alternatively, you can purchase the Crafter's Guild flag for 8 EZ Credits.
