Not able to install Now Virtual Agent for Slack integration

[Chandrashekar5]

We are trying to install Slack Integration with Now Virtual Agent App, but we are getting below error.
We have configured the SLack workspace with Admin credentials and ServiceNow user profile also has admin privileges.
The accounts at the both the systems have been configured with same email id. But still we are getting below error.

Now Virtual Agent
Now Virtual Agent could not be installed.
It looks like something has gone awry. Don’t worry it’s not your fault, but you won’t be able to install Now Virtual Agent at the moment.

Error details
Invalid permissions requested
unapproved_scope

[Victor Chen]

As mentioned, if you're on the San Diego release, have you upgraded to Patch 3+ (and also install the latest version of the Slack integration)? 

[ddd]

how to upgraded to Patch 3+

and I have already test rome, it still met the same issue

[no ta]

you have solved it?