An error occurred while encrypting a control's callback state
Error Description:
This error occurs if you host a web application in a web farm and encryption keys for this application are generated at runtime.
Solution:
To solve this issue, assign a key value to the machineKey element’s decryptionKey
attribute in the configuration file:
<machineKey
validationKey="your-validation-key"
decryptionKey="your-decryption-key"
/>
Refer to the following help topic for more information: IIS 7 Tip # 10 You can generate machine keys from the IIS manager.
See Also