Those of you who have this problem are most probably from the South East Asia region.
Read this thread: https://fxdreema.com/forum/topic/20178/can-t-export-save-mq5/12
A practical solution for now is to keep refreshing the page and try redownloading again every time it takes longer than 15 - 20 secs (depending on your number of blocks too of course).
