Yes, I tried all this. So I deleted all the entries and started from scratch. This worked fine until I had 16 entries - then I got the same error again. It looks like there is a limit of 16 items for this list. I deleted one and was able to add one 🙂 Very bad error description.
I have problems with my Netopia Modem/Router. When I try to add a new device I get the following error: haserl CGI Error [string "/www/swissbox/cgi-bin/devices.ha"]:55: bad argument #2 to 'format' (string expected, got nil) I already have added a few devices. Model: Motorola Netopia 7640-47 VDSL Modem Firmware: 9.0.10h2d8 Any idea how to fix that?