Any one else experienced this issue? Screen shot below.
Looks like upgrade caused an issue on DB, this particular error is related to SQL DB. Check the below link (its just a reference but I dont think it would help you much to resolve your issue)
http://www.verdiem.com/kb/specified-cast-not-valid-error-occurs-when-starting-sustainability-dashboard
http://stackoverflow.com/questions/13604720/sql-server-database-restore-error-specified-cast-is-not-valid-sqlmanagerui
My suggestion on this would be - raise a solarwinds support case and follow up with them regarding the same.