Visitor role cannot be found Error Message

I recently updated my Q&A plugin and now I am receiving this error message on my dashboard:

[Q&A] Visitor role cannot be found. Try to deactivate and reactivate the plugin, if you continue to see this message, consult our Help and Support.

I did go ahead and deactivate/reactivate via my network dashboard but I am still getting the message. Any suggestions?

Thanks,

John