Wrong Authorisation after a couple of flights

[eagleflight143]

i had fspax running perfectly for a while then it started doing this randomly i have reinstalled multiple times and now every time i launch a
flight i get this damn error. i have about had it with fspax and i am totally dissappointed i purchased it. might have well got a pirated copy if
the real copy doesnt even function right.

do you think it may have something to do with the sounds files? i have custom crew packs and delete the default and non-english crew
packs i was wondering if this could cause a problem? idk why because it seemed to have worked before.