AbstractException.php: fixed problem with uninitialised array element.

extension/qfq/qfq/exceptions/AbstractException.php

@@ -111,7 +111,7 @@ class AbstractException extends \Exception {
             $arrDebugShow[EXCEPTION_SIP] = $store->getStore(STORE_SIP);
             $arrDebugShow[EXCEPTION_PAGE_ID] = $t3Vars[TYPO3_PAGE_ID];
             $arrDebugShow[EXCEPTION_TT_CONTENT_UID] = $t3Vars[TYPO3_TT_CONTENT_UID];
-            $arrDebugShow[EXCEPTION_FE_USER] = $t3Vars[TYPO3_FE_USER];
+            $arrDebugShow[EXCEPTION_FE_USER] = $t3Vars[TYPO3_FE_USER]??'';
             $arrDebugShow[EXCEPTION_FE_USER_STORE_USER] = Store::getVar(TYPO3_FE_USER, STORE_USER);
 
             // Optional existing arrays will be flattened

extension/qfq/qfq/helper/Support.php

@@ -1047,7 +1047,7 @@ class Support {
 
         // date/datetime
         if ($maxLength !== false) {
-            if (is_numeric($formElement[FE_MAX_LENGTH]) && $formElement[FE_MAX_LENGTH] != 0) {
+            if (isset($formElement[FE_MAX_LENGTH]) && is_numeric($formElement[FE_MAX_LENGTH]) && $formElement[FE_MAX_LENGTH] != 0) {
                 if ($formElement[FE_MAX_LENGTH] > $maxLength) {
                     $formElement[FE_MAX_LENGTH] = $maxLength;
                 }