|Title||Fix host "Save & Test" action showing "API error" for all tests|
|Checkmk Edition||Checkmk Raw Edition (CRE)|
|Compatibility||Compatible - no manual interaction needed|
The host diagnostic page was initially showing the message "API Error: The text None is not a valid integer number." after adding or editing a host and confirming the dialog with the "Save & Test" button.
This regression was introduced by werk #11254 in version 1.6.0p15.
You could workaround this issue by clicking the "Test" button on the page showing that error. It will start the tests in the correct way.