A Web Part or Web Form Control on this Page cannot be displayed or imported. The type could not be found or it is not registered as safe.

This is a very common error that SharePoint Developers often face. As stated in the error message, this is due to SafeControl Elements in Web.Config file of your SharePoint Application not being added correctly, or perhaps pointing to the wrong type name.

Resolution

To solve this issue, you’ll need to make sure that the SafeControl Entries in your SharePoint solution projects is configured correctly.

Step 1 – Find out what is the correct type name.

  1. Navigate to your .webpart file in Visual Studio that you’ve misconfigured.
  2. Double clicking it to open the webpart file.
  3. Copy the Type Name and exclude the last node
    web part register 1
  4. Alternatively, go to your web part .cs file and copy the Namespace
    web part register 2

Now that you have the correct type name. You need to…

Step 2 – Specify the right Safe Entry

  1. Click on the Web Part
  2. Under Properties panel, click on the … icon beside Safe Control Entries
    web part register 3
  3. Enter the value found in Step 1 into Namespace field as shown below.
    web part register 4
  4. Deploy and Done!

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