There is a bug in the Codesys Web Visu.
We are working on it.
Related posts:
https://developer.community.boschrexroth.com/t5/CODESYS-PLC-Add-ons/WebVisu-started-on-port-80-normal-hmi-not-avaiable/m-p/58037
https://developer.community.boschrexroth.com/t5/CODESYS-PLC-Add-ons/CtrlX-always-open-webvisu-issue/m-p/58929
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