Queries on KQL tables are not executing

I tried querying a KQL table that was created from a text file, to no avail.

 

When I use the "Query table" option on the table and then "Show Any 100 Records", the query pane opens but nothing happens. Also when I do that a few consecutive times, the query is being added to the previous one resulting in having the same query multiple times in the query pane. Howerver, the query still doesn't execute and clicking  the Cancel button also doesn't work.