DNS error when using URLfetchapp for a URL with "=" string / URL with potential Redirect issue

Question

UPDATE

I discovered that the entire domain "https://www.mots.go.th" appears to give DNS error when using urlfetchapp, not just this specific page. Perhaps this is some sort of protection against scraping?

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I've been trying to use the Google App script UrlFetchApp command to extract an excel file from a uRL link on a website (which you can normally click on to download to your PC). This is the URL:

https://www.mots.go.th/images/v2022_1741001884711RmViLTIwMjVQLnhsc3g=.xlsx

However, it always give me the following error:

Error
Exception: DNS error: https://www.mots.go.th/images/v2022_1741001884711RmViLTIwMjVQLnhsc3g=.xlsx

(without using encodeURIComponent)

or

Error
Exception: DNS error: https://www.mots.go.th/images/v2022_1741001884711RmViLTIwMjVQLnhsc3g%3D.xlsx

(when using encodeURIComponent)

I am not sure why I am having this error with this particular URL. Normally it's not a problem. Here is the code I used to extract the blob in Google App Script:

    function apiFetch() {
    
    // URL part
    var encodeComponent = "v2022_1741001884711RmViLTIwMjVQLnhsc3g=.xlsx"
    var baseurl = "https://www.mots.go.th/images/"
    var url = baseurl + encodeURIComponent(encodeComponent)

    // Fetch contents from API endpoint.
    const apiResponse = UrlFetchApp.fetch(url).getBlob();
  
    }

Note that I have no idea how this URL gets the excel file or if there is some sort of automatic redirect to some place the UrlFetchApp doesn't like (like a private server) which is causing the DNS problem for GAS but not for a browser. Some people in the community have suggested that this may be the case, but there is no way of telling.

In any case, I tried the following to deal with redirect and it still gives me the same DNS error:

const apiResponse = UrlFetchApp.fetch(url, {'followRedirects': false, 'muteHttpExceptions': false});

And in my effort to figure out where the redirect URL is also failed as I still get the same DNS error:

var followedPost = UrlFetchApp.fetch(url, {'followRedirects': false, 'muteHttpExceptions': false});
Logger.log(followedPost.getHeaders()['Location']);

I even tried the code on this website: https://script.gs/get-the-redirect-location-of-a-url-using-google-apps-script/ and I still get the same DNS error