Hi,
I successfully upgraded from 4.1 to 4.2.1 without issue.
Please execute this command and send the result
```
# curl -u CBAdminUser:CBAdminPassword -d "statement=SELECT oxAuthConfDynamic.issuer from gluu USE KEYS 'configuration_oxauth'" http://localhost:8093/query/service
```
My result is
```
{
"requestID": "340a51ea-afe3-4dd7-8a17-933ed992fba1",
"signature": {"issuer":"json"},
"results": [
{"issuer":"https://c1.gluu.org"}
],
"status": "success",
"metrics": {"elapsedTime": "4.701132ms","executionTime": "4.625962ms","resultCount": 1,"resultSize": 32}
}
```