I am moving a web part from SharePoint 2010 to 2013. After updating the assemblies reference in Visual Studio 2012, I create a WSP file for the web part.

Then I add the WSP solution to the farm and deploy it to the Web Application. But as soon as I deploy the site collection under this Web Application starts to throw an error.

The "<Web Part Name>" Web Part appears to be causing a problem. Object reference not set to an instance of an object.

I have also checked the log but did not find anything useful. You can view the log here - Log File

I also created a new Web Application and deployed the web part on it, the site collection on this web application is working fine but I am not able to find by web part in the link when I tried to add it on the site page.

Can anyone direct me to the right way, so I can figure out the solution for this issue?

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