Have you read the release notes on changes from 2.1 to 2.2? Have you read other posts on this forum? Some config examples might help.
Anyway, check your phase 1 settings at both ends. If NAT is involved at either end then that may have worked 2.1 to 2.1 but won't with 2.2, you will have to set the identifiers accordingly.
There is an IPSEC debugging guide here https://doc.pfsense.org/index.php/IPsec_Troubleshooting .