This page describes why you might be seeing the InvalidSelectorError (or similar).
The CSS or xPath selector you are trying to use...
- has invalid characters or
- has an invalid query
Common Examples of the problemA CSS selector with the following query:
* >>> #canvas div.bwu-datagrid-row div.bwu-datagrid-cell.l0is invalid because
Unexpected token '>' at column 4