I just met the issue when testing, script error occurs when drag row from one datatable over another datatable with autoConfig=false.
Please check below sample:
to re-produce the issue:
1. click first text input, test popup show
2. drag one row from the popup table and move mouse over the datatable with autoConfig=true, on Rating or Rank column
3. you can see lots of script error
4. no error when move over textarea
5. I checked console log in chrome, and it seems different error message for different webix versions (5.4 to 6.1)