I have the same issue. It is related to the gem store on one account. If I open the the Trading Post (at a BLTC-NPC), everything works as normal. I can also switch to the Currency exchange, but when I switch to the Gem store, the game crashes after loading the top half of the page, just before the "--New Items-- --Promotions-- --Featured Items --" line.
Logging in on a different account on the same machine does not have this issue.