[BUG] 🐛 saving fails with error message

[DavidBruchmann]

Describe the bug
Saving an extension fails with the error message that a key is not defined.
This is due to missing check in the ConfigurationManager.
I'm not sure if the scenario is important:

I've created an extension and overwrote it several times but without enabled round-trip-mode (this was no fault but my intention, as the reoundtrip mode has some own issues in different locations).

Expected behavior
That saving can happen without error message and interruption.

TYPO3 Version
v11

Extension Builder Version:
v11

Additional context
The attached patch adds a variable-check.
Sorry, upload doesn't work here, so as code:

--- Classes/Configuration/ExtensionBuilderConfigurationManager.php.original	2023-12-31 22:31:45.519193871 +0700
+++ Classes/Configuration/ExtensionBuilderConfigurationManager.php	2023-12-31 22:31:43.079104601 +0700
@@ -428,7 +428,8 @@
             return $result;
         }
 
-        if ($modules[$supposedModuleIndex]['value']['relationGroup']['relations'][$supposedRelationIndex]['uid'] === $uid) {
+        if (!empty($modules[$supposedModuleIndex]['value']['relationGroup']['relations'][$supposedRelationIndex]['uid'])
+            && $modules[$supposedModuleIndex]['value']['relationGroup']['relations'][$supposedRelationIndex]['uid'] === $uid) {
             $result['terminal'] = 'relationWire_' . $supposedRelationIndex;
             return $result;
         }

[DavidBruchmann]

Here is another fix, actually I don't remember the situation very clear, but it happens on saving too that an error is thrown:

--- Classes/Controller/BuilderModuleController.php	2023-10-18 14:38:08.000000000 +0700
+++ Classes/Controller/BuilderModuleController.php.patched	2023-12-31 23:50:28.286423518 +0700
@@ -554,13 +554,14 @@
                     throw $e;
                 }
             } else {
-                if (!is_array($extensionSettings['ignoreWarnings'])
+                if (empty($extensionSettings['ignoreWarnings'])
+                    || !is_array($extensionSettings['ignoreWarnings'])
                     || !in_array(ExtensionValidator::EXTENSION_DIR_EXISTS, $extensionSettings['ignoreWarnings'])
                 ) {
                     $confirmationRequired = $this->handleValidationWarnings([
                         new ExtensionException(
                             "This action will overwrite previously saved content!\n(Enable the roundtrip feature to avoid this warning).",
-                            ExtensionValidator::EXTENSION_DIR_EXISTS
+                                               ExtensionValidator::EXTENSION_DIR_EXISTS
                         )
                     ]);
                     if (!empty($confirmationRequired)) {