Troubleshooting > Errors on Connector Startup > Error: Failed to initialize Azure IoT Hub Connector due to invalid configuration
Error: Failed to initialize Azure IoT Hub Connector due to invalid configuration
If the Connector fails to initialize, check the Connector logs and look for one of the messages shown here. Possible causes and solutions are provided for invalid configuration errors.
Invalid Configuration specified - AzureIotHub Thing
The following message appears in the Connector log:

Failed to initialize Azure IoT Hub Connector due to invalid configuration:
Invalid Configuration specified.
Please check the following configuration fields on your AzureIotHub Thing: [...]
The following table suggests possible causes and solutions:
Causes and Solutions
Possible Causes
Solutions
The Hub configuration is incomplete or invalid.
The BlobStorage configuration is incomplete or invalid.
From ThingWorx Composer:
Check the configuration values on your AzureIotHub Thing to ensure they are valid.
Check the configuration values on your AzureBlobStorageTemplate Thing(s) to ensure they are valid.
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The Connector loads and caches all configuration settings during startup. Any changes that you make to the configuration when troubleshooting are ignored until the Connector is restarted.