Exception after saving an xlf file

After saving an xlf file, I get exception #1476107295. I'm using DDEV (https://ddev.readthedocs.io/en/stable/) in version v1.21.4 as local development environment with Docker 20.10.21 on Manjaro Linux. Typo3 version 10.4.34 is installed and deployed via composer. The xlf files have rights mask 664.

lfeditor-01 lfeditor-02

The following is the message listed in the system log.

Core: Exception handler (WEB): Uncaught TYPO3 Exception: #1476107295: PHP Warning: htmlspecialchars() expects parameter 1 to be string, array given in /var/www/html/public/typo3conf/ext/lfeditor/Classes/Service/FileBaseXLFService.php line 267 | TYPO3\CMS\Core\Error\Exception thrown in file /var/www/html/public/typo3/sysext/core/Classes/Error/ErrorHandler.php in line 134. Requested URL: https://ddev-jmd.ddev.site/typo3/index.php?route=%%2Fmodule%%2Fuser%%2FLfeditorLfeditor&token=--AnonymizedToken--&tx_lfeditor_user_lfeditorlfeditor%%5Baction%%5D=editFileSave&tx_lfeditor_user_lfeditorlfeditor%%5Bcontroller%%5D=EditFile

Edited by Gerald Rathjen