Ah, of course - the signatures in fnames are all wrong. You can use live_function_add to override it to be show_debug_message(str, ...)
Viewing post in 1.0.65 - 2022.11 compatibility and HTML5 tweaks comments
Just updated and have the same issue but I'm not sure how to implement this as a solution.
From the documentation -> "Note that changing the API only affects newly compiled live code / snippets - you should perform such operations on game start."
Can you please tell me the exact code to use and where to place it?