I did, in fact, have an older version of Domoticz installed prior to the update; I don't have details, but I think it was 2020.4. I did not have to use a private window to see the Add button when using that version. Perhaps the update to 2021.1 caused the problem? The wiki says, basically, if the ...

I posted an earlier comment about the Add button missing in the Setup/Hardware page and was given the correct answer (clear the browser cache or use a private browser window). But the wiki should provide this information in the page dedicated to adding hardware. I am not in the Users group so I ...

Amazing! I opened a private window, hit my RasPi, and there is the Add button. Thanks a bunch!

Now, can you explain why the private window is necessary? I'm curious...

New install of 2021.1 on a newly configured RasPi4. When I open Setup/Hardware, no Add button appears. Everything else is there; drop-down list of hardware, name field, type field, etc. But no Add button and nothing I select in the work area causes an Add button to appear. Any idea what might be ...