Unrecognized attribute ‘targetFramework’. Note that attribute names are case-sensitive

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The problem could be:

  • the Application Pool for your site is configured for .NET Framework Version = v2.0.XXXXX
  • .NET 4 isn’t installed on your server.

See also

  • Unrecognized attribute ‘targetFramework’ …
  • How to add ASP.NET 4.0 …

… which helped me fix a similar issue.

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)