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[dev #200108100740, jdk1.3.1] Enable the disabled project module and the exception (see ide.log attachment) is shown.
Created attachment 2132 [details] The last exception in this file is related to this bug.
It is impossible to create new project until the IDE is restarted. Moreover while the restart is on the Settings Import Wizard will appear.
This problem was primarily caused by the bug in SessionManager (the first NPException), it's now fixed. Additional exception fired from DataLoaderPool.getPreferredLoader is informative and means that DataSystems can't find preferred loader (uninstalled ProjectDataLoader) for project folders and thus will use default FolderLoader. The ClassCastException isn't reproducible anymore (tested by me and juhrik who reported this issue). Jara, please reopen it in case you will experiance the problem again.
Marking as verified.
Resolved for 3.4.x or earlier, no new info since then -> closing.