No Add button in Setup/Hardware

[FastReader]

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 causing this? Perhaps I messed up a configuration?

[waltervl]

Clear your browser cache or try your browser in incognito/privacy mode.

[FastReader]

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...

[waltervl]

Using the privacy mode proves there is something in your browser cache that stops showing the add button as the privacy mode clears tthe browser cache automatically. Domoticz uses a lot of JavaScript for the webUI that will be stored in that cache.

So please clear your browser cache:
https://www.domoticz.com/wiki/Browser_Cache