Cannot find protocol definition for ESTPeripheralNearableDelegate

This warning occurs in the ESTNearableSettingsManager.h file.

@interface ESTNearableSettingsManager : NSObject <ESTPeripheralNearableDelegate>

Nevertheless, Xcode is able to compile my app without any problems, but I’m just wondering what is causing this issue, and if it is something that I should be bothered about.

That’s a harmless warning, you can ignore it. We’ll fix it soon!