strtolower() expects parameter 1 to be string, object given Issue #544

[TheRatG]

Q	A
Bundle version	1.5.4
Symfony version	4.4
PHP version	7.3

Actual behavior

  "exception" => TypeError {
    #message: "strtolower() expects parameter 1 to be string, object given"
    #code: 0
    #file: "./vendor/jms/translation-bundle/Translation/Extractor/File/FormExtractor.php"
    #line: 357
    trace: {
      ./vendor/jms/translation-bundle/Translation/Extractor/File/FormExtractor.php:357 { …}
      ./vendor/jms/translation-bundle/Translation/Extractor/File/FormExtractor.php:111 { …}
      ./vendor/nikic/php-parser/lib/PhpParser/NodeTraverser.php:123 { …}
      ./vendor/nikic/php-parser/lib/PhpParser/NodeTraverser.php:146 { …}

Steps to reproduce

Form

translation:extract en -vvv

[goetas]

thank you!