hi all !

the button 'html source' in the editor is missing. some days ago i logged in for the first time - i've never seen umbraco before. at this time it was only the problem that i could not see the html source code when i click on the html source button. i tried firefox, opera, internet explorer and google chrome. none of these browsers showed the html source - it just got a popup with a blank site. i tried to make a new site, wrote some text and switched to the source but there was still no source code. the i rebooted our webserver where umbraco and other websites are running but nothing changed. i also restarted only the iis webservice but every time the same solution - no html source code.

now i log in with different browsers and the html source button is missing (see attached picture). usually i wanted to upgrade to the newest umbraco version but first i have to solve this problem. could anyone help me please. thx