Problem with upsert using C sdk 3.1

Every time, I am trying to do upsert command, I keep getting this error: Inital connection to server successful
=== STORE ===
[ERROR] STORE: LCB_ERR_AUTHENTICATION_FAILURE (206)

I am confused on how to debug this, can someone please advise.

Hi @devintandon, could you add more details, please? Maybe you can post the code snippet you are executing? I’m assuming all other operations work (like GET for example), and you only see this issue with UPSERT, right?