InvalidTemplate.Unable to process template language expressions in action 'Html_to_text' inputs at line '1' and column '2462':The template language expression 'json(decodeBase64(triggerOutouts().headers['X-MS-APIM-Tokens']))['$connections']['shared_conversionservice']['connectionid']' cannot be evaluated because property 'shared_conversionservice' doesn't exist, available properties are 'shared_commondataservice_1,shared_sharepointonline_1'. Please see https://aka.ms/logiexpressions for usage details.'.
And the link in the message gets a 404 error.
I am thinking something isn't enabled - but this message is not clear to me.