The error points you thate there is a syntax error in the file
/opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/monit.php on line 141. Our support tool doesn't get the content of this file, so we cannot check it.
Please note that Bitnami packages and configures already existing applications. However, we can only offer support and help on basic and most frequent application configurations. Always based on the default configuration or on our guides.
The question is related to the application itself (due to a plugin), so probably someone with more experience and knowledge about that specific tool can help you better than we can. We suggest you to post your question on the official support forums of the application so others can help you.
Do not hesitate to write us back if you have any other questions regarding the Bitnami solutions or their configuration.