SharePoint 2013 - Web Part Errors

The following are some of the web part errors that provide the general solution.

Error Message:

 A Web Part or Web Form Control on this Page cannot be displayed or imported

Solution:

http://maulikdhorajia.blogspot.in/2012/03/sharepoint-2010-error-solution-web-part.html

Error Message:

Error occurred in deployment step 'Activate Features': Unable to locate the workflow's association data. To restore the association data to the workflow, restart the workflow settings wizard by selecting the workflow node in Solution Explorer and then clicking the ellipsis button (…) on one of the properties in the Properties window that has an ellipsis button" 

Solution:

Go to Visual Studio 2012 > Right Click on Workflow file > Property Window  >  Click on any one of (History List/ Target List / Task List ) ... 

Then, one popup window will open and fill required details.

Error Message:

Failed to extract the cab file in the solution

Solution:

http://mahmoudfarhat.net/post/2011/05/07/Failed-to-extract-the-cab-file.aspx

Error Message:

Unhandled exception was thrown by the sandboxed code wrapper's Execute method in the partial trust app domain

Solution:

Sandbox solution changed the  true  to false.

Error Message:

The request could not be completed because the specified solution was not found

Solution:

Just edit the page, delete the web part, then re-add the web part to the page.  This fixes the error.

Error Message:

Error validating assembly

Solution:

Set Include Assembly In Package Is false