@Tiroshan Madushanka, Apologies for the inconvenience.
Based on my understanding, you are getting this error when using the URL - https://azure.microsoft.com/en-gb/pricing/calculator/
Please let me know if this is related to something else.
This seems like a transient issue (short lived) and should be resolved on its own. Please relaunch the browser after clearing browser content/cache and try to access it again.
If you are still facing this issue, please let us know.