Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/inc/PHPePub/vendor/grandt/binstring/BinStringStatic.php on line 114

Fatal error: Uncaught PHPZip\Zip\Exception\BufferNotEmpty: Unable to send 'Alendia_Rankenspiel.epub'. Output buffer contains the following text (typically warning or errors): <br /> <b>Deprecated</b>: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in <b>/var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/inc/PHPePub/vendor/grandt/binstring/BinStringStatic.php</b> on line <b>114</b><br /> in /var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/inc/PHPePub/vendor/phpzip/phpzip/src/Zip/Core/AbstractZipArchive.php:736 Stack trace: #0 /var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/inc/PHPePub/vendor/phpzip/phpzip/src/Zip/File/Zip.php(143): PHPZip\Zip\Core\AbstractZipArchive->buildResponseHeader('Alendia_Rankens...', 'application/epu...', 'Alendia_Rankens...', false) #1 /var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/inc/PHPePub/vendor/grandt/phpepub/src/PHPePub/Core/EPub.php(2287): PHPZip\Zip\File\Zip->sendZip('Alendia_Rankens...', 'application/epu...', 'Alendia_Rankens...') #2 /var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/ePUB.php(195): PHPePub\Core\EPub->sendBook('Alendia_Rankens...') #3 {main} thrown in /var/www/vhosts/h72509.host243.alfahosting-server.de/html/ALENDIA/inc/PHPePub/vendor/phpzip/phpzip/src/Zip/Core/AbstractZipArchive.php on line 736