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Error 503 when attempting to browse the SmartConnect 2018 webservice.

Published: Dec 13, 2023
Post Author Written by David Youngquist

When attempting to browse the SmartConnect webservice after a SmartConnect 2018 installation, I am receiving an HTTP Error 503.

Error 503 after installing webservice in SmartConnect 2018

After receiving the error, the SmartConnectWCF application pool is stopped.

503 application pool stopped

If you look in the Windows Application Log in Event Viewer, you will see and IIS-W3SVC-WP error that says, “The Module DLL C:\Windows\system32\inetsrv\IisBrotli.dll failed to load. The data is the error.”

If so, this is caused by a setting in the SmartConnectWCF Application Pool. To resolve this, follow these steps.

  1. In IIS Manager, go into the Application Pools and find the SmartConnectWcf Application Pool.
  2. Right click on it and go to Advanced Settings.
503 application pool settings
  1. Change the “Enabled 32-Bit Applications” setting from “True” to “False”
503 error change 32 bit enabled
  1. After making the change, right click on the SmartConnect WCF Application Pool and select “Start” from the drop down list.
  2. Attempt to browse the web service again, and the web service should return the “Welcome to the SmartConnect WCF service” message.

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