Not adding html debug comment or x-cache engine header

Hi,

Please turn on debugging to see what’s wrong; this does not give me enough information to solve it.

OK, done. I don’t see any errors in debug.log:

PHP Notice: wp-ffpc init starting in /path/to/wp-content/plugins/wp-ffpc/wp-common/wp-plugin-utilities.php on line 59, referer: https://domain.tld/
PHP Notice: wp-ffpc 127.0.0.1:11211 added, persistent mode: 0 in /path/to/wp-content/plugins/wp-ffpc/wp-common/wp-plugin-utilities.php on line 59, referer: https://domain.tld/
PHP Notice: wp-ffpc checking server statuses in /path/to/wp-content/plugins/wp-ffpc/wp-common/wp-plugin-utilities.php on line 59, referer: https://domain.tld/
PHP Notice: wp-ffpc 127.0.0.1:11211 server is up & running in /path/to/wp-content/plugins/wp-ffpc/wp-common/wp-plugin-utilities.php on line 59, referer: https://domain.tld/
PHP Notice: wp-ffpc CRON clearing event in /path/to/wp-content/plugins/wp-ffpc/wp-common/wp-plugin-utilities.php on line 59, referer: https://domain.tld/

Only error so far: PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wp_ffpc_redirect_callback' not found or invalid function name in /path/to/wp-includes/plugin.php on line 199

hi rhodie,

was this issue solved? The new versions should have most of these issues.

No response from user.