Unable to open trader inventory and bank or any toon

Every time I click on the guild trader to access my inventory I get an assertion failure. Any ideas on how to fix this?

disable or update the custom UI if you use any

run verify on the game files from the patcher options and try again

run the game in dx9 or dx10 the opposite of what you have now

try to create a brand new toon and reach the tortage trader and see if its same