Cannot look for items on trade anymore

### Check version - [x] I'm running the latest version of Path of Building and I've verified this by checking the [changelog](https://github.com/PathOfBuildingCommunity/PathOfBuilding/blob/master/CHANGELOG.md) ### Check for duplicates - [x] I've checked for duplicate open **and closed** issues by using the search function of the [issue tracker](https://github.com/PathOfBuildingCommunity/PathOfBuilding/issues?q=is%3Aissue) ### What platform are you running Path of Building on? Windows ### Screenshots of crash/graphical issue, version and options menu I attempted to use the "Find Best" feature from the "Trader" panel, and once starting the search, it crashes with the following: ``` Error: In download callback: Modules/Common.lua:1040: attempt to call method 'gsub' (a nil value) stack traceback: Modules/Common.lua:1040: in function 'escapeGGGString' Classes/TradeQueryRequests.lua:413: in function 'callback' Classes/TradeQueryRequests.lua:61: in function 'callback' Launch.lua:315: in function <Launch.lua:314> [C]: in function 'PCall' Launch.lua:226: in function <Launch.lua:218> v0.21.0 master Press Enter/Escape to dismiss, or F5 to restart the application. Press CTRL + C to copy error text. ``` Providing a trade link fails too. I think it is related to the update of 0.5.3, probably something changed in the response payload, as it was working right before it still. ### What are your system specifications and configuration? Windows 11 POB 0.21.0 ### How to reproduce the issue - Open "Trade for items" - Click "Find Best" - Click "Execute" - Error shows up after a while ### PoB for PoE1 build code ```shell ```