At new workspace.
1. Open Web Development Perspective. Do not open JBoss Server View!
2. Window->Preferences->JBoss tools->JBoss Servers->View
3. Uncheck some checkboxes. Press Apply button.
NPE will appears (JBIDE-1483).
4. New > New project > Seam web project.
5. Create default Seam project, press Finish.
Error appears. It seems this error is somehow related to JBIDE-1483 .
Log attached
This issue will not be reproduced after JBoss Server View was opened.