One specific user (on SSO) gets a fatal 'String reference not set to an instance of a String' crash from IEE Explorer immediately on startup, with the error trace pointing at language initialization — clearing the browser and rebooting the machine hasn't helped. What else can be tried?

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Answer

Clear the contents of two client-side folders under that user's profile: C:\Users\<user_id>\AppData\Local\Apps\2.0 and C:\Users\<user_id>\AppData\Local\IsolatedStorage. This has resolved a similar language-initialization crash on IEE startup in at least one case (on an older release), and is worth trying before escalating further, since it clears out stale ClickOnce/isolated-storage state that can otherwise interfere with the client's language-initialization step.

Documentation-based answer. Confirm the product and release before applying it. This answer has not been verified in an IFS environment.

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