Internal Server error

Hello, unfortunately I have a problem with the Cyberpress plugin on my site. Every page that is related to Cyberpress shows an internal server error.

The only error message I have found is this one:

[12-Apr-2024 18:42:57 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetExists($id) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 128
[12-Apr-2024 18:42:57 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetGet($id) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 93
[12-Apr-2024 18:42:57 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetSet($id, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 74
[12-Apr-2024 18:42:57 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetUnset($id) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 138
[12-Apr-2024 18:42:58 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php:34) in /customers/c/0/e/distraction-league.de/httpd.www/wp-admin/includes/misc.php on line 1439
[12-Apr-2024 18:42:58 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php:34) in /customers/c/0/e/distraction-league.de/httpd.www/wp-includes/functions.php on line 7096
[12-Apr-2024 18:42:58 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php:34) in /customers/c/0/e/distraction-league.de/httpd.www/wp-admin/admin-header.php on line 9
[12-Apr-2024 18:43:07 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetExists($id) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 128
[12-Apr-2024 18:43:07 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetGet($id) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 93
[12-Apr-2024 18:43:07 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetSet($id, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 74
[12-Apr-2024 18:43:07 UTC] PHP Deprecated: Return type of Carbon_Fields\Pimple\Container::offsetUnset($id) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /customers/c/0/e/distraction-league.de/httpd.www/wp-content/plugins/cyberpress/vendor/htmlburger/carbon-fields/core/Pimple/Container.php on line 138

Thank you for your help and have a nice Sunday!

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