Since Skygear Server v0.23 contains some changes on default ACL (see Release Note), chat SDK have to update to avoid the warnings shown as followed:
2017-05-15 15:15:51.766691+0800 Swift Chat Demo[3972:1887317] Failed to deserialize access control entry: unrecgonized relation (null)
2017-05-15 15:15:51.766840+0800 Swift Chat Demo[3972:1887317] Failed to deserialize access control entry: unrecgonized relation (null)
Since Skygear Server v0.23 contains some changes on default ACL (see Release Note), chat SDK have to update to avoid the warnings shown as followed: