What's strange on Amethyst is that depending on the account I'm trying to send a zap, I can get an error message like this one, or not.

I'm not sure it's specific to Amethyst or maybe it's a broader nostr thing, but as Amethyst has multi accounts support this is where I noticed it. nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqpzamhxue69uhhv6t5daezumn0wd68yvfwvdhk6tcpz9mhxue69uhkummnw3ezuamfdejj7qgwwaehxw309ahx7uewd3hkctcscpyug