For all I'm aware of there is no real update. The office has indeed been closed and as of now there regrettably not the slightest shred of a sign that there will be a 14th movie.
Neither has there been (nor do I believe that in any case there would be) an official statement that it won't ever be picked up again.
There have been earlier cases in which there had been a break in the production of LBT movies, but I do not know if those breaks involved the closing of the offices.
I do not know about the economic success of the TV series which might be crucial when it comes to a possible continuation of the franchise in any form whatsoever.
Summing up all the information a continuation in the near future doesn't seems close to impossible. A continuation in general (giving it some time) is possible but may not be likely.
Hope dies last.
My greatest hope (which is based on plenty good facts

) is that for many of us the discontinuation of the official releases would be regrettable, but no "death blow" to their enthusiasm for LBT and their activity in the GOF.