hello, I've just updated from 2.3.7 to 2.4.0 and everything went smoothly but the preview environments I have in my files don't render anymore, I used to have TeX code in an ERT environment (for plots and graphs) and that ERT, inside a preview environment, would render that code inside the lyx file itself, but now it doesn't work anymore for the old files (any file that I created before 2.4.0 the preview environment doesn't work) the output still works as intended. just to make it clear that means that the preview environment doesn't work for me in all of my older files, even if I write something new. it's a minor inconvenience:\
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