Reports not working after update to 9.0 Build 9028

I have updated to 9.0 Build 9028 last night and subsequently when I try to access reports I get the following message shown on screen before being returned to the Home page.

"NTLM Failed Redirecting to Login page"

We use AD integration and SSO successfully so I am not sure why this error is being thrown.

Also, although I am not sure this is relevant, when I go to Admin -> Zoho reports integration I get the following error

FAILURE :Exception in displaying zoho reports configuration details.

Please report the problem to the system administrator. Support file will have the error trace to analyze the problem and which can be created at Support -> Create Support File.

Any help would be appreciated.

Cheers, Steve