problem syncing - invalid authentication token

Hello, 

I’m trying to use a work copy of endnote X9 to sync with a colleague’s library. When I try to sync, I get the following error:

Sync Details
Sync was last run: Never
Sync Status: There are changes that need to be sent.
Error Code: Server.AuthenticationToken.invalidUserCredentials
Error Message: invalid authentication token

Local Sync Library
Library Name: My EndNote Library2.enl
References: 0
Groups: 0
Group Sets: 1
Attachments: 0

Online Sync Library
Username: xx@xx
Serial Number: xx(Premium until February 13, 2022)
References: 0
Groups: 0
Group Sets: 0
Attachments: 0 (0)

Sync Limits
Number of References: 1000000 (1000000 can still be added)
Number of Groups: 5000 (5000 can still be added)
Number of Group Sets: 5000 (5000 can still be added)
Attachment Storage: Unlimited

Anybody know what’s going on here? I made an endnote account already.

Cheers, 

Andrew

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