Hi,
despite the bug described in this thread:
https://community.webcon.com/forum/thread/555/46
having been removed in 2021.1.3.143 (tested, worked fine), something similar is happening in 2021.1.3.163 when you use a picker field in an item list, and map it's data source-columns into other columns of the item list.
It then throws: "b.map is not a function"-error, see attached screenshot. If I dont map data source columns to other columns it doesn't throw an error.