Project Server 2010 requires at least Microsoft Internet Explorer 7" when visiting Project Web Access 2010 with Internet Explorer 7.0 or above

​1. This will happen when you also have one of below third-party browsers open:

1. AMERICA ONLINE BROWSER
2. AVANT BROWSER
3. GECKO
4. FIREFOX
5. OPERA
6. SAFARI

When these third-party browsers are open, they will be included in UserAgent in HTTP request which is sent to Project Web Access. If Project Server finds these browsers in UserAgent, it will throw the error message: "Project Server 2010 requires at least Micorosft Internet Explorer 7"

Resolution: close third party browsers

2. Set the browser mode of IE 10 to run in compatibility mode. To do so, either click on Tools > F12 developer tools in the toolbar, or click on the settings icon and choose F12 developer tools.