# Errors * [Missing SDK Configuration](#missing-sdk-configuration) * [Invalid SDK Configuration](#invalid-sdk-configuration) * [OS not supported](#os-not-supported) * [Signal Lost](#signal-lost) * [Sensors Initial Error](#sensors-initial-error) * [Loading Data Error](#loading-data-error) * [Default Venue Not Found](#default-venue-not-found) * [Default Floor Not Found](#default-floor-not-found) * [SDK Response Interface is null value](#sdk-response-interface-is-null-value) * [SDK Configuration is null value](#sdk-configuration-is-null-value) * [SDK Configuration Error](#sdk-configuration-error) * [Bluetooth Permissions Not Granted](#bluetooth-permissions-not-granted) * [Bluetooth Turned Off](#bluetooth-turned-off) * [Location Turned Off](#location-turned-off) ## Missing SDK Configuration Check if you set `Client Key`, `Client ID`, `Data URL`, `Position URL`, `Data Service Name`, and `Position Service Name` ## Invalid SDK Configuration Check if `Client Key`, `Client ID`, `Data URL`, `Position URL`, `Data Service Name`, and `Position Service Name` values match the values provided by our Customer Success Team ## OS not supported Check if the software version on your device is Android 6.0 or later minimum os supported is 23 ## Signal Lost Disconnected from server ## Sensors Initial Error One or more of your device's sensors is failing to communicate Error while registering and starting sensors (Accelerometer, Magnetometer, Gyro, Orientation, Barometer, Pedometer) ## Loading Data Error Error while loading data (Venues, Floors, Edges and Settings) ## Default Venue Not Found Error while preparing outdoor data ## Default Floor Not Found Error while preparing outdoor data ## SDK Response Interface is null value Check if you implemented the `PenNavUIDelegate` interface ## SDK Configuration is null value you have to setup the configuration [more about configuration ](configration.md) ## SDK Configuration Error Wrong data provided by configuration may one of the data is null or empty string ## Bluetooth Permissions Not Granted Ensure that Bluetooth access has been granted ## Bluetooth Turned Off Check if Bluetooth is turned on ## Location Turned Off Check if Location is turned on