c# - No assembly found containing an OwinStartupAttribute Error -


this error

the following errors occurred while attempting load app. - no assembly found containing owinstartupattribute. - given type or method 'false' not found. try specifying assembly. disable owin startup discovery, add appsetting owin:automaticappstartup value of "false" in web.config. specify owin startup assembly, class, or method, add appsetting owin:appstartup qualified startup class or configuration method name in web.config.

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

enter image description here

ive tried follow instructions on page inserting owin:automaticappstartup in config.

 <appsettings >     <add key="owin:appstartup" value="false"></add>         </appsettings>

this did not fix problem. suggestions?

add below code in web.config under tag shown in image below. error gone

<configuration>   <appsettings>     <add key="owin:automaticappstartup" value="false" />   </appsettings>   ... </configuration>

check image below


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