Error by switching to another tab in the group

[AndreyJRE]

Describe the bug
After upgrading intelij to 2026.1 on Windows. I get this error:

editor_group_stacktrace_error.txt

To Reproduce

1. Have two or more tabs in your editor group, try normally switch to another tab.
2. Check the error from intelij.

Expected Behavior
To be able to click and see another tabs also.

Environment
IntelliJ IDEA 2026.1
Build #IU-261.22158.277, built on March 25, 2026
Source revision: 89c647576f1d2
Runtime version: 25.0.2+1-b329.72 amd64137.0.17-261-b65
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.awt.windows.WToolkit
Windows 11.0
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 10000M
Cores: 20
Registry:
vcs.log.index.enable=true
ide.experimental.ui=true
ide.images.show.chessboard=true
Non-Bundled Plugins:
ru.adelf.idea.dotenv (261.22158.223)
com.intellij.ml.llm (261.22158.277)
com.jetbrains.plugins.ini4idea (261.22158.185)
Batch Scripts Support (1.0.13)
EditorGroups (4.2.0)
PerforceDirectPlugin (261.22158.185)
mobi.hsz.idea.gitignore (4.5.7)
com.haulmont.jpab (261.22158.182)
de.santiv.rbesort (1.2)
PythonCore (261.22158.277)
com.github.nikolaikopernik.codecomplexity (1.6.4)
VisualVMLauncher (1.23.1-IJ2023.3)
EclipseCodeFormatter (23.5.241.000.0-Eclipse_2024-09)
zielu.gittoolbox (600.2.5+253)
Kotlin: 261.22158.277-IJ

[Emiliorth]

Same here

[BrunoBacelar]

Exactly the same here, please provide a fix, thank you!

[BrunoBacelar]

Working as of version 4.2.1

[AndreyJRE]

Update plugin to 4.2.1. It should work.