Error facing while upgrade Telligent Community

Hi, 

   Am trying to Upgrade Telligent community version from 11 to 12. I followed all the steps as mentioned in https://community.telligent.com/community/12/a/user-documentation/UD130/how-do-i-upgrade-telligent-community

I have updated the Database and Website as mentioned in the instruction still facing the issue while loading the home page. 

 Am getting this error

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