Issue with Maximum Upload Size configuration umbraco v16

i am trying to uploading file with size more than 30MB, but when I followed the instructions on umbraco documentation

but error still like this

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When it cannot determine the max file size (i.e. the N/A token), it means that your web server blocked the request before it even reached Umbraco. You have correctly configured Umbraco to receive 100,000 kilobytes, but you need to configure your web server to do the same.

You are trying to upload a file just over 30 MB, and it fails, so that could mean your web server is limited to 30 MB. That also happens to be the limit of Azure App Services, for example. Supposedly you can configure Azure through C#:

Your mileage may vary for other web servers. IIS would need to be configured directly.