K2 Setup Manager stuck on Loading

Issue

Running the Setup Manager only shows that it is loading:

Error Code

The installer trace shows that it is attempting to validate the connection to the SMTP server:

>> SmtpValidator.Validate: Validate-Connect to server
>> SmtpValidator.Validate: Validate-Got stream
>> SmtpValidator.Validate: Could not open SSL connection: System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

Resolution

It is possible to bypass the SMTP validation using the steps below:

1. Go to the Setup folder inside the K2 installation directory (eg. C:Program FilesK2Setup).
2. Edit the Product.config file.
3. Look for the following key: <setting key="SMTPtimeout"
4. Set the value to 0:
   <setting key="SMTPtimeout" value="0" />
5. Re-run the Setup Manager.