Exception in Intellij's SBT Console: not found: value ideaPort ideaPort in Global := 49516
I fixed by deleting the <project base>/project/target
directory, as suggested here: https://youtrack.jetbrains.com/issue/SCL-15160#focus=streamItem-27-3373132.0-0
On Terminal: rm -r project/target
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| Bytecode Indices as a workaround.
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There is now even a simpler way that worked for me:
I got it from here https://stackoverflow.com/a/60042492/2750966
In my case, the reimporting of sbt project fixed the issue. This can be done by clicking on the "sbt" tab on the right pane, right-click on the project and selecting "Reimport sbt Project".
Or just hit the refresh button: