Minimal fix for ctd in lua_editor viewer #5031

[WolfGangS]

Description

Adds a try catch around the step to setup the listen for the websocket, preventing crash when port is in use.

Related Issues

• Relates to project/lua_editor crash when websocket port in use #5031

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Checklist

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Additional Notes

This should probably not be the final version of handling this error, as it is silent to the user. But as there are plans to go main grid today, it'd be nice to at least prevent crashed for people that are on main and beta grid, moving content.