I again face an issue which in this or another variation I reported once (see post link at the bottom). In essence, if location of the List Files/Folders node once was configured via a variable but that variable has gone missing, it is virtually impossible to reset it the normal way.
The variable setting, which should still be active, cannot be disabled as there is no matching variable type. It is only resolvable by manually introducing any variable of the required type to be able to disable the checkbox.
About the path implementation / support. More than two years ago, exactly with Knime 4.3, the path variable has been introduced. Still, there are many nodes, even basic Knime nodes, which do not support it. This causes lots of inconsistencies and a “painfully” variable management. What are the plans about the path variable?
As follows the more than two years old post: