The method of creating this type of custom action is not supported by Salesforce Maps and was introduced by custom development in legacy products. For more information, please see Premier, Premier Plus, and Signature Success: Developer Support on what is supported in Salesforce Maps developer support. Although we recommend reviewing the out-of-the-box actions like Launching a Lightning Component or Launching a Visual Flow to achieve similar behavior, below is a sample code to reference to update existing code. Please note Salesforce Support cannot make changes to your code.
Original Code:
MAActionFramework.on('ready', function () {
Updated Code:window.addEventListener('load', function () {
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