26.1.18 Windows7/XP no
For the past seven days, hosts running on Windows 7 or older have been unreachable.
Specifically, the process is running, the service is active, and the agent responds to commands, but no image is displayed upon connection. This issue is caused by the latest host client being installed. If the new version is uninstalled and an older version is installed instead, the connection works normally and the image is displayed correctly.

It has been 16 days since ConnectWise/ScreenConnect released an agent update that rendered all older operating systems inaccessible.
In those 16 days, there has been no rollback, no temporary fix, and absolutely no assistance provided to us as customers. This is a very poor performance for a company like ConnectWise. Apparently, the slogan 'Remote Support and Access Software to Fix IT Faster' doesn't apply to their own products.
A fix is available for cloud and can be applied at any time.
A fix for on premises will be released next week.
You can track release status here:
ScreenConnect 26.1 / ScreenConnect
Please bear in mind that we do our best to support legacy, end of life operating systems, we do not guarantee they will work in all cases. (System requirements - ConnectWise)