I am getting the same thing.  It started last night and seemed OK this morning but now it is nothing but blank Pages.  I seem to be able to get on most forums eventually but Poser is a complete no go area.  I am using IE 10 when getting this problem.  Blank pages stays with the download indicator spinning.  This happens as soon as you choose Poser from the forum list.  On rare occasions you can get to the Poser threads but clicking on any thread again gives you a blank screen.  Hitting the back button gives you a quick flick of the thread list but then it reverts to blank page.

No such issue with Chrome but I have no issue with IE on any other site, it even seems to work on the Marketplace OK.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.