Theme Export klappt nicht

[Sascha]

Website läuft unter Contao 3.5.25. Nach betätigen des Theme-Export Buttons erhalte ich folgende Fehlermeldung:

Warning: include(/mnt/web113/e0/18/51098518/htdocs/website-neu/system/modules/core/library/Contao/ZipWriter.php): failed to open stream: No such file or directory in system/modules/core/library/Contao/ClassLoader.php on line 161

#0 system/modules/core/library/Contao/ClassLoader.php(161): __error(2, 'include(/mnt/we...', '/mnt/web113/e0/...', 161, Array)
#1 system/modules/core/library/Contao/ClassLoader.php(161): include()
#2 [internal function]: Contao\ClassLoader::load('ZipWriter')
#3 system/modules/core/classes/Theme.php(736): spl_autoload_call('ZipWriter')
#4 system/modules/core/classes/Backend.php(430): Contao\Theme->exportTheme(Object(Contao\DC_Table))
#5 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('themes')
#6 contao/main.php(20): Contao\BackendMain->run()
#7 {main}


Warning: include(): Failed opening '/mnt/web113/e0/18/51098518/htdocs/website-neu/system/modules/core/library/Contao/ZipWriter.php' for inclusion (include_path='.:/opt/RZphp71/includes') in system/modules/core/library/Contao/ClassLoader.php on line 161

#0 system/modules/core/library/Contao/ClassLoader.php(161): __error(2, 'include(): Fail...', '/mnt/web113/e0/...', 161, Array)
#1 system/modules/core/library/Contao/ClassLoader.php(161): include()
#2 [internal function]: Contao\ClassLoader::load('ZipWriter')
#3 system/modules/core/classes/Theme.php(736): spl_autoload_call('ZipWriter')
#4 system/modules/core/classes/Backend.php(430): Contao\Theme->exportTheme(Object(Contao\DC_Table))
#5 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('themes')
#6 contao/main.php(20): Contao\BackendMain->run()
#7 {main}


Warning: include(/mnt/web113/e0/18/51098518/htdocs/website-neu/system/modules/core/library/Contao/ZipWriter.php): failed to open stream: No such file or directory in system/modules/core/library/Contao/ClassLoader.php on line 148

#0 system/modules/core/library/Contao/ClassLoader.php(148): __error(2, 'include(/mnt/we...', '/mnt/web113/e0/...', 148, Array)
#1 system/modules/core/library/Contao/ClassLoader.php(148): include()
#2 [internal function]: Contao\ClassLoader::load('Contao\\ZipWrite...')
#3 [internal function]: spl_autoload_call('Contao\\ZipWrite...')
#4 system/modules/core/library/Contao/ClassLoader.php(164): class_alias('Contao\\ZipWrite...', 'ZipWriter')
#5 [internal function]: Contao\ClassLoader::load('ZipWriter')
#6 system/modules/core/classes/Theme.php(736): spl_autoload_call('ZipWriter')
#7 system/modules/core/classes/Backend.php(430): Contao\Theme->exportTheme(Object(Contao\DC_Table))
#8 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('themes')
#9 contao/main.php(20): Contao\BackendMain->run()
#10 {main}


Warning: include(): Failed opening '/mnt/web113/e0/18/51098518/htdocs/website-neu/system/modules/core/library/Contao/ZipWriter.php' for inclusion (include_path='.:/opt/RZphp71/includes') in system/modules/core/library/Contao/ClassLoader.php on line 148

#0 system/modules/core/library/Contao/ClassLoader.php(148): __error(2, 'include(): Fail...', '/mnt/web113/e0/...', 148, Array)
#1 system/modules/core/library/Contao/ClassLoader.php(148): include()
#2 [internal function]: Contao\ClassLoader::load('Contao\\ZipWrite...')
#3 [internal function]: spl_autoload_call('Contao\\ZipWrite...')
#4 system/modules/core/library/Contao/ClassLoader.php(164): class_alias('Contao\\ZipWrite...', 'ZipWriter')
#5 [internal function]: Contao\ClassLoader::load('ZipWriter')
#6 system/modules/core/classes/Theme.php(736): spl_autoload_call('ZipWriter')
#7 system/modules/core/classes/Backend.php(430): Contao\Theme->exportTheme(Object(Contao\DC_Table))
#8 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('themes')
#9 contao/main.php(20): Contao\BackendMain->run()
#10 {main}


Warning: Class 'Contao\ZipWriter' not found in system/modules/core/library/Contao/ClassLoader.php on line 164

#0 [internal function]: __error(2, 'Class 'Contao\\Z...', '/mnt/web113/e0/...', 164, Array)
#1 system/modules/core/library/Contao/ClassLoader.php(164): class_alias('Contao\\ZipWrite...', 'ZipWriter')
#2 [internal function]: Contao\ClassLoader::load('ZipWriter')
#3 system/modules/core/classes/Theme.php(736): spl_autoload_call('ZipWriter')
#4 system/modules/core/classes/Backend.php(430): Contao\Theme->exportTheme(Object(Contao\DC_Table))
#5 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('themes')
#6 contao/main.php(20): Contao\BackendMain->run()
#7 {main}


Fatal error: Uncaught exception Error with message Class 'ZipWriter' not found thrown in system/modules/core/classes/Theme.php on line 736

#0 system/modules/core/classes/Backend.php(430): Contao\Theme->exportTheme(Object(Contao\DC_Table))
#1 system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('themes')
#2 contao/main

[BugBuster]

Dann prüfe mal deine Installation (Contao Check), denn die gibt es im Original:
https://github.com/contao/core/blob/.../ZipWriter.php

[Sascha]

Danke Datei hat gefehlt;-)