This topic contains information on how to diagnose and fix common errors. It is divided into sections based on error codes or log messages.
Response code 400
Connecting to: https://performanceparameters.googleapis.com/v1/applications/... TuningFork:Web: Response code: 400 TuningFork:Web: Response message: Bad You can get this error if your API key is invalid. See Enable the API.
Response code 403
TuningFork:Web: Connecting to: https://performanceparameters.googleapis.com/v1/applications/...:generateTuningParameters TuningFork:Web: Response code: 403 TuningFork:Web: Response message: Forbidden You can get this error if your API key is not enabled or you made an error when restricting the API key (for example, you used the wrong certificate or hash value). See Enable the API.
"No parameters: no fidelity parameters" warning and "java.lang.NoSuchFieldError" shown in logs
TuningFork:FPDownload: No parameters: no fidelity parameters TuningFork: java.lang.NoSuchFieldError: no "[Landroid/content/pm/ApplicationInfo;" field "applicationInfo" in class "Landroid/content/pm/PackageInfo;" or its superclasses TuningFork: Could not get fidelity params from server : err = 4 These are harmless warnings emitted by the Tuning Fork library when checking to see if the app has the debuggable flag set. While verbose, they are harmless and are not indicative of a problem in the integration of the library. You can ignore these warnings.