Support Assistant update fails to install

I've tried to install the latest Support Assistant without success. The installer reports failure and exits. Below is an entry from the Support Assistant Agent log file:

2020-07-27 20:07:04,502 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.ViewModel.AppViewModel - Installer Started with Arguments: esupport. UI visible: True
2020-07-27 20:07:04,797 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.ViewModel.AppViewModel - Current Culture being Set: en-US
2020-07-27 20:07:05,708 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.ViewModel.AppViewModel - Manufacturer Value : Dell Inc.
2020-07-27 20:07:07,668 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.MainWindow - Mutex Created New : True
2020-07-27 20:07:11,368 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.MainWindow - All prerequisite product check passed
2020-07-27 20:07:11,948 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.SupportAssistInstaller.Installer - Installed Version: 0.0.0.0
2020-07-27 20:07:12,126 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Creating Temporary Download Directory for Auto Update C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate
2020-07-27 20:07:12,129 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Temporary Download directory for Auto Update created at C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate
2020-07-27 20:07:12,132 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Starting to download SupportAssist Agent Catalog file from FTP Server....................
2020-07-27 20:07:13,264 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.SecurityUtility.CertificateUtility - Validating the url certificate...
2020-07-27 20:07:13,548 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.SecurityUtility.CertificateUtility - Validated url certificate successfully
2020-07-27 20:07:13,588 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.DownloadManager.DownloadManager - Starting Download of : https://dl.dell.com/serviceability/catalog/SupportAssistAgentCatalog.cab
2020-07-27 20:07:13,591 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.DownloadManager.DownloadManager - Determining the number of segment. Content length is : 10891 bytes
2020-07-27 20:07:13,745 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - DownloadCatalogFile download Status: Success
2020-07-27 20:07:13,747 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - SupportAssist Agent Catalog file successfully downloaded from FTP Server at C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate\SupportAssistAgentCatalog.cab
2020-07-27 20:07:13,751 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Starting to validate digital signature for the catalog file downloaded.........
2020-07-27 20:07:13,985 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.SecurityUtility.CertificateUtility - Is Executable file from the trusted authority: True for the file: C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate\SupportAssistAgentCatalog.cab
2020-07-27 20:07:14,038 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.SecurityUtility.CertificateUtility - Is Certificate Subject matches: True for the file: C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate\SupportAssistAgentCatalog.cab
2020-07-27 20:07:14,039 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Digital Signature for the catalog setup file is valid
2020-07-27 20:07:14,040 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Starting to decompress SupportAssist Agent Catalog file downloaded FTP Server....................
2020-07-27 20:07:14,441 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - SupportAssist Agent Catalog file successfully decompressed at C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate
2020-07-27 20:07:14,444 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Installed Version of SupportAssist Agent : 0.0.0.0
2020-07-27 20:07:14,460 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistAgentCatalogFileReader - Start Reading File C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate\SupportAssistAgentCatalog.xml
2020-07-27 20:07:14,685 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistAgentCatalogFileReader - Successfully Read File C:\WINDOWS\TEMP\SupportAssistAgent\AutoUpdate\SupportAssistAgentCatalog.xml
2020-07-27 20:07:14,687 [3.6.0.184] [7332 - 6] ERROR Dell.Services.SupportAssist.AutoUpgradeHelper.SupportAssistInstallerPackage - Some Error occured while checking version of latest SupportAssist Agent : Object reference not set to an instance of an object.
2020-07-27 20:07:14,688 [3.6.0.184] [7332 - 6] INFO Dell.Services.SupportAssist.AutoUpgradeHelper.AutoUpdate - Auto Update Exiting with success False
2020-07-27 20:07:14,688 [3.6.0.184] [7332 - 6] ERROR Dell.Services.SupportAssist.SupportAssistInstaller.InstallSupportAssist - SupportAssist download/installation failed with return code: error
2020-07-27 20:07:14,854 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.MainWindow - Releasing all the held Resources
2020-07-27 20:07:23,029 [3.6.0.184] [7332 - 1] INFO Dell.Services.SupportAssist.SupportAssistInstaller.MainWindow - Application Exit Code: error