Landing page error in version 12 - After Migration

Hi All,

We have migrated the data from version 6.5 to version 12 environment (Patch level 16).

After migration we are facing below errors on the standard landing pages present on dashboard. We were initially facing this similar types of errors which we have resolved by validating the 

graphical queries.

Also after performing the VEN05 and VEN06 Statistic parameters validation, we have started receiving  X3 engine error for that particular pages. Kindly refer the below screenshot for the same.

Any inputs on this will be highly appreciated.

Thank you.