Hello Edgaras,
Thank you for your message.
Could you please clarify if you've upgraded your Viewer to the latest version before the issue had occurred or after? If you've upgraded the Viewer after, then please try following
this step-by-step guide that will help you to upgrade your Hosts remotely, so that you can continue using Remote Utilities.
If your Viewer was already upgraded before as well as your remote Hosts, please let us know.
Looking forward to your reply.