Try using task scheduler to run a vbscript, which in turn controls uivision. In my experience, running my automation on AWS, it’s more stable this way.
What I use (for yr reference):
objShell.ShellExecute “D:\FF1\FirefoxPortable.exe”,"-private-window file:///D:/FF1/ui.vision.html?direct=1¯o=Tier1/Test&closeBrowser=1 -no-remote","",“runas”,1
May sound a little clunky at first, but using vbscript this gives you a lot of control, especially if you want to set different conditions on how and when you want your automation to run in the future.