Guild Wars 2

every time when I want to see whats new in gem store I got blac screen
PLX HELP what can I do ?

Do you use Avast Anti Virus? Since the last Virus data update it thinks, something in the GW2 TP might be a virus and blocks/deepsearch it.

This link (or other threads in the BLTC sub-forum) may be useful: https://forum-en.gw2archive.eu/forum/support/bugs/Unable-to-open-Trading-Post/first#post4111056

Good luck.