If the access to the element information is not allowed, show some
information to the user instead of returning an empty string.

Resolves: #83067
Releases: master, 8.7
Change-Id: Ie4ca3ba41556813a44802fc60befe164a17c4178
Reviewed-on: https://review.typo3.org/54811


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Henning Liebe <h.liebe@neusta.de>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>