
Good Day Ganesh!
Thank you for using Google Groups.
I was able to find an official guide provided by Google for this action. It would be my recommendation to follow the steps found here[1] for setting a spending limit. However, if you encounter the same issue after following the official steps then you can try it once more with “incognito mode” or something equivalent to this for your browser. This would eliminate any chance of cookies, third party extensions and/or existing logins that might be interfering with the save process.
In the event that this issue persists, it would be recommended to redirect this post to a private issue on our Public Issue Tracker[2] as this action would provide you the appropriate support for this.
Also, it is important to note that spending limits are not supported in the App Engine flexible environment.