To make the troubleshooting easier, we could add a displaying mechanism for Logs. For security reasons, the log folder needs to have a special name, needs an index.php file and a .htaccess file like: https://github.com/inpsyde/backwpup/blob/bdb72dd8d51076d7e11bf9ce52e0f94e1246ca33/inc/class-file.php#L184-L189

We need to consider log rotation also. We could either use a Logging library like Monolog or simply create a custom and lighter one to avoid potential collisions with conflicting composer versions from other plugins.