Here's a perplexing issue that's been affecting Samsung Galaxy S7 owners — in addition to folks on a handful of other Android devices. It goes a bit like this: You start up an app for the first time and accept the usual permission dialogs. Then you're hit by a message like this:

A screen overlay is a part of an app that can display over the top of other apps. The most well-known example is chat heads in Facebook Messenger. But apps need your permission to use screen overlays, and sometimes this can cause problems. For example, if an app were able to display something over the top of a permission dialog, it could try and trick you into granting it permission to do stuff you might not want.

The simplest fix is to basically do what the dialog box tells you to do. The language is a little confusing, but what it's asking you to do is: