However, those are only supported since PHP 7.4. This broke a customer's Contao installation after an update because there's only 7.3 available on their webserver.
I suggest you either exclude older PHP versions from this release or you don't use typed properties :)
Since the FileUtil class has been added, this bundle only works in PHP 7.4+. In line 16, typed properties are used ( https://github.com/heimrichhannot/contao-utils-bundle/blob/master/src/Util/File/FileUtil.php ):
However, those are only supported since PHP 7.4. This broke a customer's Contao installation after an update because there's only 7.3 available on their webserver. I suggest you either exclude older PHP versions from this release or you don't use typed properties :)