PHP 8.0.0 Login from Plesk not working

[Harm Jakob Tolsma]

Be aware that logging in using the newly released PHP 8.0.0 leads to HTTP 500 Server Error when loggin in through Subscription screen.
From the WordPress sites list, it shows 'WordPress administrator credentials are missing' error. This also somehow makes Plesk 'forget' the admin credentials.

Server Error
500 PleskExt\WpToolkit\Exception\WpCliExecutionException
PHP Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php:75 Stack trace: #0 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php(75): implode() #1 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CompositeCommand.php(32): WP_CLI\DocParser->get_longdesc() #2 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/Subcommand.php(20): WP_CLI\Dispatcher\CompositeCommand->__construct() #3 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CommandFactory.php(93): WP_CLI\Dispatcher\Subcommand->__construct() #4 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CommandFactory.php(40): WP_CLI\Dispatcher\CommandFactory::create_subcommand() #5 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/class-wp-cli.php(480): WP_CLI\Dispatcher\CommandFactory::create() #6 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/commands/help.php(192): WP_CLI::add_command() #7 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/RegisterFrameworkCommands.php(32): include_once('...') #8 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/bootstrap.php(75): WP_CLI\Bootstrap\RegisterFrameworkCommands->process() #9 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/wp-cli.php(23): WP_CLI\bootstrap() #10 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/boot-fs.php(24): include_once('...') #11 {main} thrown in /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php on line 75 Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php:75 Stack trace: #0 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php(75): implode() #1 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CompositeCommand.php(32): WP_CLI\DocParser->get_longdesc() #2 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/Subcommand.php(20): WP_CLI\Dispatcher\CompositeCommand->__construct() #3 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CommandFactory.php(93): WP_CLI\Dispatcher\Subcommand->__construct() #4 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CommandFactory.php(40): WP_CLI\Dispatcher\CommandFactory::create_subcommand() #5 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/class-wp-cli.php(480): WP_CLI\Dispatcher\CommandFactory::create() #6 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/commands/help.php(192): WP_CLI::add_command() #7 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/RegisterFrameworkCommands.php(32): include_once('...') #8 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/bootstrap.php(75): WP_CLI\Bootstrap\RegisterFrameworkCommands->process() #9 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/wp-cli.php(23): WP_CLI\bootstrap() #10 /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/boot-fs.php(24): include_once('...') #11 {main} thrown in /opt/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/wp-cli/php/WP_CLI/DocParser.php on line 75

 

[Aleksey Filatev]

Thank you for your report! We are acknowledging several issues with PHP 8.0 support, that will be addressed in one of the nearest releases of WordPress Toolkit.

 

[farukga]

Hey guys,
I have a problem after upgrading one of my websites (in development) to PHP 8.
I can confirm the same error @Harm Jakob Tolsma has and another one which is probably up to WP Toolkit. The website is working fine but Toolkit says that it's broken. An error log and screenshot is in the attachment. I hope it will help you to improve. If you need more info feel free to ping me.

 

[Aleksey Filatev]

Thank you for the information! Seems like this is a known issue with PHP8 we are working with right now. We will double-check it will be fixed in the nearest update.