Receiving CTE syntax error with 10.1.48-MariaDB-0ubuntu0.18.04.1

Question

Beginner with MariaDB and trying to understand the syntax. I’m trying to create the simplest example and then build from there. Shouldn’t the following work?

with myCTE as 
  (SELECT 1 as MyNum, 'A' as MyChar  
  UNION  
  SELECT 2 as MyNum, 'B' as MyChar)  
SELECT *  
FROM myCTE  

I’m looking at the following three references and believe that I am adhering to their approach:

1. https://www.mariadbtutorial.com/mariadb-basics/mariadb-cte/
2. https://www.mysqltutorial.org/mysql-cte/
3. https://mariadb.com/kb/en/non-recursive-common-table-expressions-overview/

I’m sure I’m missing something simple, but just can’t see it.
Using MariaDB and TablePlus on iPad and I get generic error message:

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'myCTE as ( … Thanks for the assistance… First question on Stackoverflow