3.12 web-ui events panel empty and events notification not displayed.
Please check what error you get if you open "/debug.html" version of the web app.
In Debug, the new events panel is showing content, and also the alerts do show up.
attached is the screenshot of the error on console when an event arrives.
I am not able to read anything on your screenshot.
So sorry, please find the clear screenshot here
You have some problem with alarm sounds. I suspect that it's caused by some browser extension.
I did some further testing as below. and got same results everywehre.
I disabled all extensions opened a new fresh browser tried and same result. - chrome
I tried Firefox and IE and same result.
I tried on android mobile chrome browser both desktop version and mobile same.
the events panel (only the type column shows blank) and the alert notification content is blank.
I also disabled/uninstalled anti-virus from the above machine.
And finally tried another computer as well, same result (The type column in events window is blank)
(Also i have 3.11 running and tested now , they all work fine on same browser and machines)
Can I have access to the server to try myself?
Sure, I am emailing you the credentials in 5 minutes.
I have the same exact issue , please update us with the solution.
yes its same with me
this is screenhot 
TraccarManager(Android)
&
Chrome browser
The event popup in V.3.12 is a small empty text box in the upper center (in V.3.11 below right was reporting correctly)
here the same with chrome.
seeing same issue here after upgrade to 3.12.
Hello,
I have upgraded 3.11 to 3.12 version, I have enabled web notifications for all event types.
However the events do not show a notification or load in the events panel. (but they are available in database/eveent reports as well).
I further checked, console of browser, the moment there is an event frame via websocket, the console displays the following error.
Rest all seems to work perfectly, and I have also restarted traccar instance. Have I done something wrong? while upgrading?