Any tips for getting started with a Financial Institution Plugin. I started with the example in the documentation about it and removed most of it just to point getConfigurationIFrameUrl() to a suitlet. But it fails with UNEXPECTED_ERROR before even running that entry point. I'm trying to select my connectivity method in a format profile and expect it to show a suitelet in an iframe.

/**
 * @NApiVersion 2.1
 * @NScriptType fiConnectivityPlugin
 * @NModuleScope SameAccount
 */
define([],function(){
    
        function getConfigurationIFrameUrl(context) {
            log.debug('start getConfigurationIFrameUrl')
            context.configurationIFrameUrl = "/app/site/hosting/scriptlet.nl?script=2090&deploy=14817&configurationId=abc"// + configurationId;
        }

        function getAccounts(context) {
            log.debug('start getAccounts')
        }

        function getTransactionData(context) {
            log.debug('start getTransactionData')
        }

        return {
            getConfigurationIFrameUrl: getConfigurationIFrameUrl,
            getAccounts: getAccounts,
            getTransactionData: getTransactionData
        }
    });