I have this error that appears to me when I try to match data from a Google Sheet file to Notion. The Notion options appear at first then suddenly I have this error which appears: “Issues: There was a problem loading the parameter option from server: Can’t connect to N8N”
How are you running n8n at the moment? It could be that you are getting a rate limit from Google Sheets or Notion it may be handy to share your workflow and some screenshots as well so we can get a better idea of what is going on.