Managed package with source code inside org throws error while generating symbol table and none of the button works

[Nagendra Singh]

I created an unmanaged and a manage package in this org. The source code for manage package also exists in this org. Now I created sfdx project. When I try to generate Symbol table it throws error and none of the buttons related to illuminated cloud works.

IntelliJ IDEA 2021.1 (Ultimate Edition)
Build #IU-211.6693.111, built on April 6, 2021
Licensed to IQVIA / Nagendra Singh
Subscription is active until October 16, 2021.
Runtime version: 11.0.10+9-b1341.35 amd64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 4031M
Cores: 8
Non-Bundled Plugins: PMDPlugin (1.8.16), com.checkmarx.intellij (9.00.20), com.github.jk1.ytplugin (1.2.1), com.guidewire.build.ijdevkitmvn (0.4.1), org.jetbrains.kotlin (211-1.4.32-release-IJ6693.72), Pythonid (211.6693.115), com.illuminatedcloud2.intellij (2.1.7.0)
Kotlin: 211-1.4.32-release-IJ6693.72

[Scott Wells]

Duplicate of #1857.

[Scott Wells]

Please see issue #1857 and assuming that both the standard Python and Docker plugins are enabled, disable one or both. If you must keep both enabled, you will need to roll back to 2020.3 until JetBrains provides a fix. If you don't have both of those plugins enabled, please let me know.

[Nagendra Singh]

But it works fine for normal sfdx org, where I am not creating a managed package with the org source code.

[Scott Wells]

The issue in the provided log is the same as from #1857 and is due to a regression in IntelliJ IDEA 2021.1 (and other JetBrains IDEs of that same release version). I don't understand the latest comment on the context of that issue.