Hello world is not printing in customer card page

mdsr
mdsr Member Posts: 163
edited 2019-10-18 in NAV Three Tier
i have installed BCental.and vs code I have made necessary changes in app.json and launch.json .download al symbols.installed al extension .build a package but when publish it will not giving me an error and not showing any msg on customer card page.any solution on this.
thanks in advance.
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