Cannot open WP Toolkit in Plesk: Declaration of PleskExtWpToolkitControllerAction::apiResponse(array $data = [], string $status = ”, string $message = ”) must be compatible with

Symptoms

System updates installation fail:

ERROR: Declaration of PleskExtWpToolkitControllerAction::apiResponse(array $data = [], string $status = '', string $message = '') must be compatible with PleskExtWpToolkitControllerActionRemoteServersTrait::apiResponse($data = [], $status = '', $message = '') (Action.php:439)

The same error is displayed when accessing Extensions > My Extensions > WordPress > Open.

Cause

Outdated WP Toolkit does not work with sw-engine PHP 8.0 that was installed with Plesk update 50. 

Resolution

Try either of the following:

• Update WP Toolkit extension manually
• Install the latet Plesk updates