Andrew,
Looking at the screenshot, it shows the end of your callsign-SSID, as
N5FAB-i, greyed out just next to the error message.
Note that the error message says "... and an optional Secondary System ID
number (1-15)".
You still have the -i SSID set, which is not AX.25 compliant. It
intentionally uses a non-AX.25 compliant SSID at first for web stations,
so that they don't get confused with APRS-IS stations so easily.
At the bottom of the beacon view there's a Rename button. Use it to change
the SSID from "-i" to a number between 1 and 15, for example "N5FAB-5".
On Wed, 20 Jan 2021, Andrew Beal wrote:
> Here is a picture of the error:
>
- Hessu