Index: Classes/Persistence/Repository.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/Classes/Persistence/Repository.php b/Classes/Persistence/Repository.php
--- a/Classes/Persistence/Repository.php	
+++ b/Classes/Persistence/Repository.php	(date 1741764600623)
@@ -281,6 +281,9 @@
         $query = $this->createQuery();
         $constraints = [];
         foreach ($criteria as $propertyName => $propertyValue) {
+            if (!is_string($propertyName)) {
+                throw new \Exception('Repository::findBy() expects an array with string keys as first argument. ');
+            }
             $constraints[] = $query->equals($propertyName, $propertyValue);
         }