I use an external library to get column headers.
Usually, this error is either because there is configuration change needed or due to path issues
Try to run orderman using OrderMan.bat. You can change the path of AutoHotkey.exe as per your system. Thats how i use.
Or you can try to run OrderMan.ahk from an editor like
scite.
If there are path issues, this should fix it.
Otherwise, you will need to check what window title/control needs to be changed for latest ZT
If you can code ---
The error above is thrown by Orderbook.ahk:_readColumnHeaders() at
this._extractColumnIndices( "Order Book > Open Orders", allHeaders, headers, this._openOrdersColumnIndex, keys )
You will have to check if any change is needed for any control or Text. These are all listed in GUIControls/Now.ahk and overridden for Nest in GUIControls/Nest.ahk
Hopefully fixing the path will work, but again i have not tested it with latest Nest, i use NOW. And GUI automation like this has to be checked for every new release. Obviously i cannot do that for every broker/version ..