println (and all of kotlin.io) show up as 'unresolved reference' in IntelliJ after updating kotlin to version 1.4.10 from 1.3.72

In, quite literally a hello world project the IDE seems to think println and any other parts of kotlin.io are not resolved.

The project builds and runs just fine, however. The issue exists in 1.4.0 but not 1.3.72.

The io package in kotlin-stdlib-1.4.10.jar the IDE seems to think is missing, even though it really isn't (ss attached)

The following is my build.gradle. Changing 1.4.10 to 1.3.72 fixes all the problems.

plugins {
    kotlin("jvm") version "1.4.10"
}

group = "ga.rubydesic"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    implementation(kotlin("stdlib-jdk8"))
}

tasks {
    compileKotlin {
        kotlinOptions.jvmTarget = "1.8"
    }
    compileTestKotlin {
        kotlinOptions.jvmTarget = "1.8"
    }
}