...
The error message "Failed to update Nagvis maps 500" will be displayed if you run an old PHP Version.
Solution
- Please update to the latest available PHP version.
- We recommend checking the changelog from Nagvis: https://www.nagvis.org/home
- We recommend checking our werk page for the Nagvis release: https://checkmk.com/de/werks?search=Nagvis.
- To fetch the Nagvis version info: Open Nagvis → Need Help? → Nagvis Support Information
or see Accessing Nagvis maps directly
...