I get the error message mentioned in the title from time to time and do not know why.
It happens for a self-written app. Two weeks ago I had no problems and everything worked fine. But since last week I get an access that contains the information “expires:” “Tue, 31 Mar 1981 05:00:00 GMT”.
In february, I had this problem too but no time to search a solution. So I did not change anything but it work again two weeks ago (as said).