On March 26, 2019, Magento SUPEE 11086 was given access. The patch is designed to address vulnerabilities such as cross-site scripting (XSS), near remote code execution (RCE), cross-site request forgery (CSRF), and others.
However, it has the drawback of Magento Logging Fails After Installing SUPEE 11086 Patch!
The function that Magento added to check extensions in log files is what is causing the issue. If the log file does not yet exist, the readable() function throws an error.
Use the suggested fix to solve the Magento logging problem. https://meetanshi.com/blog/magento-logging-failed-after-installing-supee-11086-patch/