The external application you are using has requested access to your Salesforce data and you denied this access. You should log out of Salesforce. You can go back to the originating application. Required Editions Available in: both Salesforce Classic (not available in all orgs) and Lightning Experience Available in: All Editions User Permissions Needed To manage, create, edit, and delete OAuth apps: Manage Connected Apps
The external application you are using has requested access to your Salesforce data and you denied this access. You should log out of Salesforce. You can go back to the originating application. Required Editions Available in: both Salesforce Classic (not available in all orgs) and Lightning Experience Available in: All Editions User Permissions Needed To manage, create, edit, and delete OAuth apps: Manage Connected Apps