I just migrated a non-production server from Appian 7.9 to Appian 16.1. When I t

I just migrated a non-production server from Appian 7.9 to Appian 16.1. When I tried to open a site that was created in 7.9 it shows "Working..." for a couple seconds and then goes away and nothing loads. At the same time there is an error in the application server log which is attached.

I tested creating a new site and had no issues. Will all sites made prior to 16.1 need to be recreated?

error.txt

OriginalPostID-192867

OriginalPostID-192867

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