Error loading checkmk page xibo-player

"** Message: 14:48:57.647: console message: @0: Unrecognized Content-Security-Policy directive ‘frame-ancestors’.

** Message: 14:48:57.647: console message: @0: Unrecognized Content-Security-Policy directive ‘base-uri’.

** Message: 14:48:57.647: console message: @0: Unrecognized Content-Security-Policy directive ‘form-action’.

** Message: 14:48:57.647: console message: @0: Unrecognized Content-Security-Policy directive ‘worker-src’.

** Message: 14:48:57.654: console message: https://server/cmk/check_mk/js/main_min.js?v=2.3.0p33 @1: SyntaxError: Unexpected token ‘)’

** Message: 14:48:57.654: console message: https://server/cmk/check_mk/dashboard_dashlet.py?id=1&mtime=0000000000&name=simple_problems_noc @2: ReferenceError: Can’t find variable: cmk

** Message: 14:48:57.654: console message: https://server/cmk/check_mk/dashboard_dashlet.py?id=1&mtime=0000000000&name=simple_problems_noc @2: ReferenceError: Can’t find variable: cmk"

Xibo cms: 4.2.3
xibo-player Ubuntu 20.04

I want to integrate a CheckMK dashboard.

I set the widget to the “Dispaly web page” type. Entered URL and set it to open it native.

Snap Xibo player for Linux is abandonwared.