No assembly found containing an OwinStartupAttribute Error : <p>This error </p>

<p>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.</p>

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

<p><a href="https://i.stack.imgur.com/rDKpi.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/rDKpi.jpg" alt="enter image description here"></a></p>

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

<pre><code> &lt;appSettings &gt;
    &lt;add key="owin:AppStartup" value="false"&gt;&lt;/add&gt;
        &lt;/appSettings&gt;
</code></pre>

<p>this did not fix the problem. Any suggestions?</p>
