Hi @organictrain, sorry to hear you’re running into trouble.
Could you please tell me what version of Aseprite you’re using and the palette name you tried to import?
This error typically occurs when Lospec sends bad data to the extension, or generally means the palette info was mangled somehow.
You may also want to check that your firewall isn’t blocking traffic from Lospec, as some users have found that.
For now, please try removing and reinstalling the extension.