PostgreSQL - Error: Expected =, <, <=, <>, >, >=, !=, got 'IS'

[crmpicco]

I am having an issue with the Doctrine Query Builder in my Symfony 4.4 application.

The specific part of my query that is failing is the IS NOT TRUE part.

I get the following error:

In QueryException.php line 32:
                                                                                     
  [Syntax Error] line 0, col 829: Error: Expected =, <, <=, <>, >, >=, !=, got 'IS'  

$qb = $this->_em->createQueryBuilder();
$qb->select(
   $qb->expr()->count('s.id').' AS total_clubs',
   "SUM(CASE WHEN s.currentTier = 'platinum' AND s.uefa IS NOT TRUE THEN 1 ELSE 0 END) AS platinum_clubs_non_uefa",
   "SUM(CASE WHEN s.currentTier = 'platinum' AND s.uefa = TRUE THEN 1 ELSE 0 END) AS platinum_clubs_uefa",
   "SUM(CASE WHEN s.currentTier = 'gold' THEN 1 ELSE 0 END) AS gold_clubs"
)

I have a tried a variety of <> TRUE, != TRUE and = FALSE but I haven't been able to pull the data I want out.

The query that works when I query the PostgreSQL database manually is:

...AND uefa IS NOT TRUE;

How can I tweak this query to pull out non-truthy values from this boolean field?

composer show | grep doctrine                                                            
doctrine/annotations                 1.13.2             Docblock Annotations Parser
doctrine/cache                       2.1.1              PHP Doctrine Cache library is a popular cache implementation that supports many different drivers...
doctrine/collections                 1.6.8              PHP Doctrine Collections library that adds additional functionality on top of PHP arrays.
doctrine/common                      3.3.0              PHP Doctrine Common project is a library that provides additional functionality that other Doctri...
doctrine/data-fixtures               1.5.3              Data Fixtures for all Doctrine Object Managers
doctrine/dbal                        2.13.8             Powerful PHP database abstraction layer (DBAL) with many features for database schema introspecti...
doctrine/deprecations                v0.5.3             A small layer on top of trigger_error(E_USER_DEPRECATED) or PSR-3 logging with options to disable...
doctrine/doctrine-bundle             2.6.3              Symfony DoctrineBundle
doctrine/doctrine-fixtures-bundle    3.4.1              Symfony DoctrineFixturesBundle
doctrine/doctrine-migrations-bundle  3.0.3              Symfony DoctrineMigrationsBundle
doctrine/event-manager               1.1.1              The Doctrine Event Manager is a simple PHP event system that was built to be used with the variou...
doctrine/inflector                   2.0.4              PHP Doctrine Inflector is a small library that can perform string manipulations with regard to up...
doctrine/instantiator                1.4.1              A small, lightweight utility to instantiate objects in PHP without invoking their constructors
doctrine/lexer                       1.2.3              PHP Doctrine Lexer parser library that can be used in Top-Down, Recursive Descent Parsers.
doctrine/migrations                  3.4.2              PHP Doctrine Migrations project offer additional functionality on top of the database abstraction...
doctrine/orm                         2.12.1             Object-Relational-Mapper for PHP
doctrine/persistence                 2.5.1              The Doctrine Persistence project is a set of shared interfaces and functionality that the differe...
doctrine/sql-formatter               1.1.2              a PHP SQL highlighting library

pg_config --version
PostgreSQL 12.9
psql --version
psql (PostgreSQL) 12.9