Hi Hungary,
I also have the same problem with a PHP 7.4 version on a multisite WordPress.
Just simply launching the wp with no parameters brings the error too.
So I downgraded the version to the previous one, and the issue disappeared.
Here is the trace :
$> wp
Fatal error: Uncaught Error: Call to a member function getCssFile() on null in /***/wp-content/plugins/wp-reviews-plugin-for-google/wp-reviews-plugin-for-google.php:44
Stack trace:
#0 /***/wp-includes/class-wp-hook.php(303): WP_CLI\Runner->{closure}()
#1 /***/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
#2 /***/wp-includes/plugin.php(470): WP_Hook->do_action()
#3 /***/wp-settings.php(578): do_action()
#4 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1317): require(‘/***…’)
#5 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1235): WP_CLI\Runner->load_wordpress()
#6 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php(28): WP_CLI\Runner->start()
#7 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php(78): WP_CLI\Bootstrap\LaunchRunner->process()
#8 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php(27): WP_CLI\bootstrap in /***/wp-content/plugins/wp-reviews-plugin-for-google/wp-reviews-plugin-for-google.php on line 44`
Thanks in advance ??
Best regards
Arnaud BeLO.