I have updated to version 29.0.5. I am receiving the warning: No memory cache has been configured. To improve performance, please configure Memcache if available. However, Redis is already installed or present. This error message never appeared before. Please see my config.php.
Removing the lines of code triggers two error messages in the GUI:
The database is being used for transactional file locking. To improve performance, please configure Memcache if available. For more information, refer to the documentation. No memory cache has been configured. To improve performance, please configure Memcache if available. For more information, refer to the documentation.