我有两个不同的多站点：

www.example。org www.example-two。org在这两个网站上，都有5个子网站。

它们托管在同一台服务器上（我使用VirtualMin自行设置）。所有10个子网站共享相同的父主题，不同的子主题有细微的变化。

我已将这些网站转换为古腾堡-但每当我上传图像时，就会出现以下错误：

The response is not a valid JSON response.

... 此处可见：

在错误日志中，我得到以下错误：

[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: PHP Fatal error:  Uncaught Error: Call to undefined function upload_is_user_over_quota() in /PATH/TO/FOLDER/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php:808, referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit

以下是整个堆栈跟踪：

[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: PHP Fatal error:  Uncaught Error: Call to undefined function upload_is_user_over_quota() in /PATH/TO/FOLDER/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php:808, referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: Stack trace:, referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: #0 /PATH/TO/FOLDER/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php(734): WP_REST_Attachments_Controller->check_upload_size(Array), referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: #1 /PATH/TO/FOLDER/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php(108): WP_REST_Attachments_Controller->upload_from_file(Array, Array), referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: #2 /PATH/TO/FOLDER/wp-includes/rest-api/class-wp-rest-server.php(936): WP_REST_Attachments_Controller->create_item(Object(WP_REST_Request)), referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: #3 /PATH/TO/FOLDER/wp-includes/rest-api/class-wp-rest-server.php(321): WP_REST_Server->dispatch(Object(WP_REST_Request)), referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: #4 /PATH/TO/FOLDER/wp-includes/rest-api.php(266): WP_REST_Server->serve_request(\'/wp/v2/media\'), referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit
[DATESTAMP] [fcgid:warn] [pid 12345:tid 123456789012345] [client CLIENT_IP:55472] mod_fcgid: stderr: #5 /PATH/TO/FOLDER/wp-inclu in /PATH/TO/FOLDER/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php on line 808, referer: http://EXAMPLE.ORG/wp-admin/post.php?post=30&action=edit

看起来是这样的others are experiencing 此错误也是如此。

有人知道这方面的解决方法吗？

if ( ! function_exists( \'upload_is_user_over_quota\' ) ) {
    function upload_is_user_over_quota( $echo ) {
        return false;
    }
}