Why do i get this error many times per day on the web interface of um?
Invalid response from server to asynchronous polling connection.

thank you,

Do you have the latest User Manager (RouterOS) version?
How long was User Manager interface opened, before you got the particular problem?

Version is 5.16 and the interface must be open through out the working hours of 8 to 5. I get them about 4 times.
I am connected to the router with a lan cable!