Table.SelectRowsWithErrors gives "This table is empty"

I have aata imported from CSV and manipulated so I am very familiar with errors and the GUI always lets me view errors which makes it easy to troubleshoot.  But this has me stumped.

Refresh on my table tells me there's 9039 errors (of 9039 rows).  OK so this is not uncommon if I am mishandling a null or datatype and it's usually a simple fix.
My go to is a simple search to show me the error column(s) for the first few rows to save time.  To save confusion here I show the line of code that produces 0 rows 

let
    Source = Interactions,
     KeptErrors = Table.SelectRowsWithErrors(Source, Table.ColumnNames(Source))
in
    KeptErrors

Clicking on View Errors results in no activity so I manually created the table above to help me figure it out - not knowing if the problem is the tool mis-reporting errors or if Table.SelectRowsWithErrors is just wrong.  I assume it'll be somewhere in between where the refresh data thinks something is an error but SelectRowsWithErrors doesn't.

Of course when I scroll along every column looking for any sign of Error or NaN or the like I find nothing.

I am sure this will be a trick/tip for newbies like me if someone has the time to point me to where I'm going wrong I'd appreciate it greatly.