In Android N the WebView and Chrome packages were combined in order to reduce the update size for users. Updating Chrome also updates WebView. This means that in the Play store the WebView package will appear to be permanently disabled. The Play store WebView entry is only relevant for users with older operating systems, and users who have decided to disable Chrome.

If you need, or are being asked by an application, to update WebView, the action you should take now is to UPDATE CHROME. This should resolve any issues you are currently experiencing.

We would also like to understand what led you to file this bug so that we can reduce the number of users experiencing this issue and work with application developers to direct users to the correct Play store page.

If an application has directed you to update WebView, and sent you to the WebView page in the Play store to do so, please comment on this bug to tell us which application did so.

If updating Chrome does not stop the application from redirecting you to the Play store, please also provide that information on this bug.



As for the 491 error I don't know what this means - that should not be related to Android WebView.
I would suggest having a look at some Android forum and/or filing a bug against Android about the 491 error.