When a user browses to the default page of ArchiOffice/EngineerOffice, it displays a server error ‘unrecognized attribute…’ in the application.
The error occurs during the processing of a configuration file required to service this request.
You can correct this problem by taking the following steps:
- Open the IIS Manager from Start > Control Panel > Administrative Tools > Internet Information Services.
- On the left, click to expand your local computer name-Sites. Right-click on AO20xx and select Properties.
- Move to the ASP.NET tab. For ASP.NET version, select 4.x (say 4.0.30319).
- Click OK.