invalid byte panic when posting

[duckwork]

Issuing this command:

springboard post https://spring83.kindrobot.ca <<EOF
<style>body{color:yellow;background:navy;}</style>
<h1>acdw's board</h1>
<p>Yoooo, what's up.  I am here:</p>
<ul><li><a href="https://www.acdw.net">acdw.net</a></li>
<li><a href="https://breadpunk.club/~breadw">breadpunk</a></li>
<li><a href="https://acdw.casa">casa</a>
</li>
</ul>
<p>Uh,,,, I guess, stay tuned?</p>
EOF

I get this error:

panic: encoding/hex: invalid byte: U+009F

goroutine 1 [running]:
github.com/motevets/s83/pkg/springboard.GetKeys({0x0?, 0xc00002c000?})
	/home/runner/work/springboard/springboard/pkg/springboard/keys.go:51 +0x24d
github.com/motevets/s83/pkg/springboard.Client.SignAndPostBoard({{0x7ffe471e425b?, 0xc00000e010?}}, {0xc00019c000, 0x13f, 0x0?}, {0x0?, 0x1007fd4c657b6d0?})
	/home/runner/work/springboard/springboard/pkg/springboard/client.go:66 +0x65
main.post()
	/home/runner/work/springboard/springboard/cmd/springboard/main.go:104 +0x167
main.main()
	/home/runner/work/springboard/springboard/cmd/springboard/main.go:20 +0xf0

I'm using version 2.3.0 on Debian 11. The board I was posting is in the command above.

Fixed: Needed to generate a key first

After generating a key, it worked fine. I'm still posting this issue because I figure issuing a panic when a key isn't present is bad UX.