how to insert twitter widget into blockcmsinfo

[nuevo]

hello when i try to insert this code to blockcmsinfo, it give to me an expcetional error in some lines.

 

this is the code:

 

            <a class="twitter-timeline"  href="testpage example" data-widget-id="example number">Tweets por @example</a>

        

 

i try to add {literal} but still doesn´t work.