Editor gone if install "Darkest Dark Theme" from eclipse marketplace on V4.3.3

[SturmWolfgang]

I like using dark mode - so I am working with the "Darkest Dark Theme" since I am using sloeber. It worked fine till today. As for preperation of the tests for 4.4 I downloaded newest version 4.3 from here: http://eclipse.baeyens.it/stable.php?OS=Windows

on a blank install, pointing to my workspace, I installed the theme, after this every panels says: something like:
"No editor descriptor for id org.eclipse.cdt.ui.editor.CEditor"
for serial monitor " io.sloeber.ui.monitor.views.SerialMonitor"

To Reproduce

• use http://eclipse.baeyens.it/stable.php?OS=Windows
• install "Darkest Dark Theme" from Marketplace
• restart
  => error appears

restart does not help

[SturmWolfgang]

the funny thing is: I have another sloeber 4.3 version, (lets say my productive version) where it works fine.
Same sloeber versions as in the picture on the previous post

[SturmWolfgang]

on 4.4 the theme installed without problems

[jantje]

I guess you are running in #1280
Basically it is a compatibility issue between java CDT and Sloeber
With 4.4 and java 11 you are on the latest for everything and that is most likely to work.