Our deployment of umbraco to production in azure the backoffice isnt accessible. Just get a white screen when I go to /umbraco with lots of 404s showing in the console and

Uncaught Error: [$injector:modulerr] Failed to instantiate module umbraco due to:
Error: [$injector:modulerr]

I've cleared the client dependency folder, updated the version number and restarted no luck.

I've also added the following into the web.config.

<location path="clientdependency.axd">
  <system.webServer>
     <security>
        <requestFiltering allowDoubleEscaping="true">
           <requestLimits maxUrl="500" maxQueryString="3000" maxAllowedContentLength="52428800" />
        </requestFiltering>
     </security>
   </system.webServer>
</location>

any other options I can try?