Can I get the camera communication error from the metadata?How can I get the camera communication errors from the metadata?

The metadata you mention here might be the logs, in the System Logs in the Management Client you will see if there were camera errors or similar.

As a first step look in the Management Client if this is the information you seek.

If this is the information you need you can explore how to read the log from a MIP SDK based application by using the Log Read sample.

https://doc.developer.milestonesys.com/html/index.html?base=samples/componentsamples/logread/readme.html&tree=tree_search.html?search=logread