sql-language-server: how to solve Error NO_RESULT_CALLBACK_FOUND

When I open nvim to a .sql file, I get the following error:

LSP[sqlls]: Error NO_RESULT_CALLBACK_FOUND: {
  id = 1,
  jsonrpc = "2.0",
  result = {
    capabilities = {
      codeActionProvider = true,
      completionProvider = {
        resolveProvider = true,
        triggerCharacters = { "." }
      },
      executeCommandProvider = {
        commands = { "sqlLanguageServer.switchDatabaseConnection", "sqlLanguageServer.fixAllFixable
Problems" }
      },
      renameProvider = true,
      textDocumentSync = 1
    }
  }

I suspect it is related to connecting to my db? (seems like the easiest place for things to go wrong?)

I have the following project configuration located in the project root (I don’t have a personal config):

{
  "name": "dev-db",
  "adapter": "postgres",
  "host": "db-postgresql-ondigitalocean.com",
  "port": 25060,
  "database": "db_v2",
  "user": "admin",
  "password": "secret",
  "sslmode": "require"
}

Note the sslmode is not documented, but is used to connect to digital ocean.

Question

What does the above error suggest for how to solve it?

Thank you!