You can download the update pack instead of the AIO and just use the www folder inside of there. When you get it up and running just create a direct link to the HBL link on the 5.5.1 page (first option at the top). Then use the instructions for tricking the wii u to load that link every time. That way when you click on the internet browser you'll see the page you're looking for without having to click or tap any links.
Here are those instructions:
*note5*
If you want to trick your Wii U into loading the same page every time that you open the browser follow these steps:
1. Let's say I want to load the HBL direct launch every time that I open my 5.5.1 Wii U browser. First turn off your server. (or just turn off wifi)
2. Open the browser and type in the direct link for your exploit (in my case "
http://192.168.11.169:12345/Wiibrew/hbl/index.php")
3. The page will fail (if you have your webserver off or ethernet disconnected or wifi turned off)
4. Press the Home button
5. Press Wii U Menu
6. Open Mii Maker and let it load.
7. Exit Mii Maker with the button in the bottom left
8. Turn on your server, plug in your ethernet or turn on your wifi
Now every time you open your browser it will go to that link immediatly. You can cancel this by following the same steps for a different link.
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Is that the exact error message? "Can't download file?" or is it something else? I haven't seen that error before. Did you follow all the steps in the instructions for the pack? I'm using the PHP from Loadiine.ovh so if that works for you then you should have the same success with my local hosting package.