This error 

The following errors occurred while attempting to load the app.
- No assembly found containing an OwinStartupAttribute.
- The given type or method 'false' was not found. Try specifying the Assembly.
To disable OWIN startup discovery, add the appSetting owin:AutomaticAppStartup with a value of "false" in your web.config.
To specify the OWIN startup Assembly, Class, or Method, add the appSetting owin:AppStartup with the fully qualified startup class or configuration method name in your web.config.

appears on my screen on the most face burningly ugly error page ever created in history. 

[![enter image description here](https://i.stack.imgur.com/rDKpi.jpg)](https://i.stack.imgur.com/rDKpi.jpg)

Ive tried to follow the instructions on the page by inserting the owin:AutomaticAppStartup in the config.

```
 <appSettings >
    <add key="owin:AppStartup" value="false"></add>
        </appSettings>

```

this did not fix the problem. Any suggestions?