Request possibly null in EXT:container Upgrade Wizard

[80Quattro]

Occurs if there is also installed the extension b13/container

After update to v12 (typo3 & powermail) the all Upgrade Wizards need to be executed.

While executing Wizard EXT:container: Migrate "container" sorting, I see

This error is repeated in many installations where both extensions are installed.

[80Quattro]

I suggest a quick patch as a temporary solution

Index: Classes/EventListener/FlexFormParsingModifyEventListener.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/Classes/EventListener/FlexFormParsingModifyEventListener.php b/Classes/EventListener/FlexFormParsingModifyEventListener.php
--- a/Classes/EventListener/FlexFormParsingModifyEventListener.php
+++ b/Classes/EventListener/FlexFormParsingModifyEventListener.php	(date 1709025191229)
@@ -77,13 +77,16 @@

     private function getPidForCurrentRecord(): int
     {
+        $uid = 0;
         $request = $this->getRequest();
-        $queryParams = $request->getQueryParams();
-        $uid = array_keys($queryParams['edit']['tt_content'] ?? [])[0] ?? 0;
+        if($request) {
+            $queryParams = $request->getQueryParams();
+            $uid = array_keys($queryParams['edit']['tt_content'] ?? [])[0] ?? 0;
+        }
         return DatabaseUtility::getPidForRecord($uid, 'tt_content');
     }

-    private function getRequest(): ServerRequestInterface
+    private function getRequest(): ?ServerRequestInterface
     {
         return $GLOBALS['TYPO3_REQUEST'];
     }