Please find our answer in the support ticket that Chris submitted:
Could you please inform us did you go over the official Sitefinity upgrade documentation?
Could you please make sure you’ve followed all steps correctly, including the last paragraph which elaborates about the changes introduced in the Analytics module with Sitefinity 6.2 and the corresponding configuration settings that need to be performed after upgrade?
After you upgrade Sitefinity to 6.2, the Sitefinity connection to the Google Analytics module is reset. You must configure the connection again. To do this, you must first register then setup the Analytics module.
For more information, see Register the Analytics module and Setting up Analytics.
Note that all configurations described in steps 6 should be applied in your web.config files.
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