Apps Script deployed as a Web App returns 404 error
The problem
You deployed your Google Apps Script code as a Web App. However, when you open the web app's URL, it returns a 404 error.
Solution
When you deploy your script as a Web App, you will receive a URL like the following:
https://script.google.com/macros/s/AKfycbzeIVAZxmaJreUILd3Ub7wrLj_a7xlYDOB3MU66vNPter-S1t0/exec
Sometimes the URL will contain /u/1/. If you see this in the URL, please remove it.
Next, if you deployed the script from within a G Suite domain. Please add /a/<your domain name> right after https://script.google.com.
https://script.google.com/a/example.com/macros/s/AKfycbzeIVAZxmaJreUILd3Ub7wrLj_a7xlYDOB3MU66vNPter-S1t0/exec
🛈 Please replace example.com in the above URL with your G Suite domain.
Now, try opening the URL in your browser. Your web app will no longer return a 404 error and you should be able to see the output generated by your web app.
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