Using UiPath Apps, I received the notice below from yesterday till now and no action can be done.
Welcome to the Community!
Yesterday there was UiPath cloud outage that might have impacted you.
I would advise to refresh the page or restart the browser and try again. There are chances that your changes might get lost due to this, but there is no other option.
Thanks,
Ashok 
For sure this basic Actions already Done and the problem still exist 
Ohh ok, then something got stuck at server side. If you are on enterprise license, raise this on Customer Portal.
Thanks,
Ashok