400 Bad Request with favicon.ico in landing pages (3)

During the transfer from my landing page to the offer page, I encounter the 400 Bad Request error. When checking with Debug tool of Chrome, I find that the error is due to missing favicon.ico file



I checked this thread https://stmforum.com/forum/showthrea...viconico-thing and applied this solution

<link rel="icon" href="data:;base64,iVBORw0KGgo=">

Just create and upload your own favicon.

1. Go to https://www.favicon.cc/ and create or find a favicon.
2. Upload the favicon to the root folder of your lander.
3. Replace the code with <link href="favicon.ico" rel="icon" type="image/x-icon" />

Done.

I discovered the real reason of this error is because I use the direct URL to the landing page. I should use the campaign URL provided by Voluum.