[2022] New War Railjack Bug Has Made Warframe Unplayable

Are you aware that Railjack has its own control bindings that are different from your regular binds? If you go to Options, Controls, and then scroll down to near the bottom there is "Customize Key Bindings" under the Railjack heading. Try rebinding the Fire control there.

If that doesn't work, you'd need to create a Support ticket and send us your EE.cfg file which contains your key bind setup.  Use these instructions if it becomes necessary.