Plugin triggers PHP fatal errors on updates and PHP 8
PHP fatal errors after an update or on newer PHP versions crash the site or flood logs, including an uncaught argument count error.
Tier II · Emerging Problems that are still building up.
4 public reports · first reported 23 January 2018 · last reported 16 December 2025
What's going wrong
Site owners report fatal errors after updating the Campaign Monitor for WordPress plugin, with uncaught errors about missing arguments, undefined classes, file closing, and max calls on empty arrays.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 4 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.