(Sorry if there is already a guide for this ;-; )
I had the error 'No Data Received' error when trying to access www.skyblock.net for quite a while- which resulted in me using my laptop computer. However, I did end up figuring out how to fix it- at least for Avast.
Note: This is for Windows, dunno if it's the same on Mac



Step one:

In your toolbar at the bottom right of your screen, there a symbol for avast, the orange 'a'. Double click on this.


Step two:

Go to the settings tab on the bottom left (the highlighted orange cog on the screenshot).


Step three:

Go to the Active Protection tab on the new window that has appeared on the top left.


Step four:

Click on the Customise button under the Web Shield (highlighted in blue on screenshot).


Step five:

On this new window, select Exclusions on the top left.


Step six:

In the URLs to exclude section (make sure the box is ticked) type www.skyblock.net.

Click OK, and you're done!
Yay!

I hope this works, but it may not work for everyone~
~Lycel :cat

 

Dayum

 

Nice Guide, I got lost when you started haha

 

Gunna burmpero this ^-^

 

How is there 2 Lycel's?

 

Bump once more.

 

xD That's my old account that got deleted, so I guess this is my ghost :O

 

Zambiana delete Lycel so I can have that name.

 

That name was available for a whole 4 days, a few months ago c;

 

I was banned at the time xD

 

I just connect directly to Skyblock Forums and it bypasses the Avast! :I

 

I used the "stop for 1 hour web shield"

 

The only thing with that is that now you're unprotected to not just Skyblock, but to everything. ;/