Not sure what causes the problem but I think its related to efile. 

I was getting an error message that foreign address was missing. Tried deleting the form but the message reselected it with same error.

Since it didn't occur until I tried to efile, I thought I'd try unchecking efile, F9 to recalculate, F10 to save without efile. 

Then I was able to delete form 2555 and efile the return. 

Don't know what caused it but it seems to be related to e-filing. 

This isn't a fix but it was a work around for my situation. Which was no foreign earned income yet still getting an error for Form 2555 when attempting to efile the return

It may help to fix your problem.

GLP