WSS mxdevtools/ connection failed

Hi All, does any one can give me some advice on “mxdevtools/  connection failed” issue on cloud(seems it doesn’t impact they system functions)? the issue only happened after i deploy to cloud. i guess it might be caused by one widget try to refresh something in timer with js. in local, the issue doesn’t there.. here i want to know what exactly the root cause? how could i debug and then find out the widget for which result the issue? Local: On cloud:   as i saved log into DB, hence in DB, so many logs for that… thank you very much.
1 answers

seems the issue caused by no license(initially i'm useing free license)