The WYSIWYG editors are great additions to the Joomla, and we have lots of them around. They make a webmaster from casual user and can speed up the work of pros. But, sometimes, you find that you cannot enter text into the HTML editor, or click on...
It seems that module parameters haven't been configured properly. Please make sure that you are using a valid twitter username, and
that you have inserted the correct keys. Detailed instructions are written in the module settings page.