Hello, IntelliJ IDEA 2023.2.2 Ultimate underlines all my code in red for

.main.kts

scripts. it used to be fine. I'm getting this error message in the IDE on hovering any line:

Cannot access script base class 'org.jetbrains.kotlin.mainKts.MainKtsScript'. Check your module classpath for missing or conflicting dependencies

What's happening?

Did you try

File | Repair IDE

?

I haven't, will try