title: Google Sheets getting Invalid error in drop down but item is on the list
body: <p>In Google Sheets, I created a data validation cell to select different time slots. I am getting an error when choosing 6:00, 7:00, 8:00, 9:00 even tho all of them are in the  list. Error says: &quot;Invalid: Input must be an item on the specified list&quot;
  Added the data validation like this: <a href="https://i.stack.imgur.com/GAKmJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GAKmJ.png" alt="enter image description here" /></a></p>
  <p>Thanks a lot in advance!</p>
  <p>The file is here: <a href="https://docs.google.com/spreadsheets/d/1NSBx87sWScwe2Vtp9FOcH3BupvPJ_jzISUeAk6gSBOM/edit#gid=612415402" rel="nofollow noreferrer">https://docs.google.com/spreadsheets/d/1NSBx87sWScwe2Vtp9FOcH3BupvPJ_jzISUeAk6gSBOM/edit#gid=612415402</a></p>