This error can occur because one of the following causes.
1. The required CA Root certificate is not installed on the client device.
2. If your server certificate was issued by an intermediate certification authority, the Win32 ICA Client version 6.20.985 will not connect using SSL.
3. Error code occurs after upgrading to ICA Client 7.0
4. Ensure DNS is properly configured between the client machine and the FQDN of the Citrix Secure Gateway Server.
For more information, please refer to the suggestions provided on the following sites.
If all the suggestions above do not work, I would suggest you to contact Citrix Support with the issue as well.
Hope this information helped!
Thanks and regards,
Fouzan – Microsoft support.
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