Hello Felines and Hoomans of Hivelandia!

Well, I had a really nice Caturday post ready to go...

What's up?

But every time I tried to post it, I got a strange error message I have not seen before:

I thought perhaps it was a PeakD related error, so I tried from Hive.blog... and then from Ecency, but each time the same/similar message came up.

Then I wondered if it was a Keychain issue, and logged out, and logged in directly with my posting key.

Nope. Same error message.

So now I am posting this much simplified message to see if it will go through, and if it DOES, to ask any of you technically inclined folks to explain — if you can — what the issue might be.

Thanks in advance!

Edited to add: Well, since this posted, there must be something in my original post that clashes with allowable parameters... just not sure what.

=^..=