Unable to Save Checkout Customization

I am working on an internal checkout extension. I can add the extension block to my dev store checkout customization and I can see it just fine in the editor but when I click save nothing seems to happen. And when I go to my dev store checkout I cannot see the block I added. I don’t get an error on the screen or from the developer window on chrome.

Hi @cvazquez

Have you recently released a new version with shopify app deploy? If the editor save is still unresponsive, you can try refreshing, or use another browser, or check your extension config.

Hi @Liam-Shopify thanks for the reply. Im not deploying the app as its not finished, currently running manually by starting up the server.

Ive tried different browsers and even different computers, when I click on the save button, from the dev tools, I can see an internal JavaScript error occurs, and my browser sends an error report to your Bugsnag service at error-analytics-sessions-production.shopifysvc.com.