We are seeing several reports of a Google Play Services are Updating message when attempting to use Glympse. This is an issue with the Google Play services itself, and this is impacting many map based apps on several devices, including Glympse. The Glympse engineers don't have the ability to correct the Google Play issue, but we have seen that the steps listed in the article below showing how to clear data and cache have been solving the issue for our users. Please have a look at the article, follow the steps outlined here, and if you continue to experience errors, please open a ticket with the Google Play Services team.
Example of error: