I would post a support ticket on the plugin author’s site, but the site is down: https://renzojohnson.com/contributions/contact-form-7-mailchimp-extension
ISSUE:
Several clients use this plugin and just recently PHP errors started showing up in New Relic. I went to visit a site to disable the plugin and the site was down. Error below:
E_ERROR: Allowed memory size of 134217728 bytes exhausted (tried to allocate 11798841 bytes)
I tried increasing the allow memory size to 128MB using the following code, but it did not help.
define(‘WP_MEMORY_LIMIT’, ‘128M’);
The only way to get each site back up and running was to manually disable the plugin itself by FTP’ing into the site and renaming this directory:
wp-content/plugins/contact-form-7-mailchimp-extension/
to
wp-content/plugins/_contact-form-7-mailchimp-extension/
This little trick forces the plugin to stop running and WordPress will come back. I hope this helps someone out there. For now, we are keeping this plugin disabled until a new release fixes this problem.
Here’s the stack trace for the plugin author:
…ck_encoding called at /home/****/public_html/wp-includes/
wp-db.php (2888)
…check_ascii called at /home/****/public_html/wp-includes/
wp-db.php (3001)
…nvalid_text called at /home/****/public_html/wp-includes/
wp-db.php (2341)
…cess_fields called at /home/****/public_html/wp-includes/
wp-db.php (2219)
…db::update called at /home/****/public_html/wp-includes/
option.php (378)
…tml/wp-content/plugins/contact-form-7-mailchimp-extension/lib/
chimp_db_log.php (70)
…lic_html/wp-content/plugins/contact-form-7-mailchimp-extension/
cf7-mch-ext.php (259)
in include_once called at /home/****/public_html/wp-settings.php (362)
in require_once called at /home/****/public_html/wp-config.php (112)
in require_once called at /home/****/public_html/wp-load.php (37)
in require_once called at /home/****/public_html/wp-cron.php (39)