This has been a bug, of sorts, for about a week now and seems to have gotten worse. It started with 1.5.15 and I have upgraded to 1.5.16 and 1.5.18 this morning. I don’t think it started when I upgraded to 1.5.15 either, it was after I had been using that version for a while.
Anytime I try to stop/restart a dashboard, I get a notification of “Request failed with status code 405” and the service does not restart. Reading the log, it didn’t seem to indicate anything noticeable.
Hopefully i captured this correctly. My first click was on the front page of the dashboard, the “Pause” button. Then clicked on the “Info” button of the dashboard and tried “Stop” then “Restart” buttons. Then the export to .har.
This looks like an issue with WebDAV in IIS. You can find some discussion here on how to configure your site and server to remove or configure WebDAV to allow PUTs.