The following error is displayed when you try to update Photoshop Elements 2020 on macOS:

"There is no application set to open the URL auphd://update?sapCode=PSE&baseversion=17.0&platform=osx10-64&skipUpdateInfo=true."

Workaround

Navigate to the following location: /Library/Application Support/Adobe/Adobe Desktop Common/HDBox and run the file named Adobe Update Helper.app. This will manually run the update.