Click "Upload" to open the following interface:

Server error in/Application.

The system cannot open the file.

Description: An unhandled exception occurred during the execution of the current web request. Please check the stack trace to learn more about the error and its source in the code.

Exception Details: System. IO.IOException: The system cannot open the file.

Source error:

An unhandled exception was generated during the execution of the current web request. Information about the source and location of exceptions can be identified using the following exception stack trace.

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