Rubymine show diff empty window

have the same on mac for webstorm, on windows everything is ok

Could you please check whether the problem persists in RubyMine 2019.3 EAP?

The problem is still present. Sometimes I have issues when just starting RM and it won't show anything on the window.

RubyMine 2019.2.3
Build #RM-192.6817.16, built on September 24, 2019
...
You have a perpetual fallback license for this version
Subscription is active until September 11, 2020
Runtime version: 11.0.4+10-b304.69 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.13.6
GC: ParNew, ConcurrentMarkSweep
Memory: 1981M
Cores: 8
Registry: ide.mac.allowDarkWindowDecorations=true, ide.tree.ui.experimental=false, ide.balloon.shadow.size=0
Non-Bundled Plugins: com.alayouni.ansiHighlight, com.chrisrm.idea.MaterialThemeUI, com.intellij.ideolog, net.seesharpsoft.intellij.plugins.csv, org.elm.klazuka, BashSupport, com.jetbrains.lang.ejs, org.jetbrains.plugins.vue, ru.adelf.idea.dotenv

@..., have you tried RubyMine 2019.3 EAP? If not yet then could you please try it with all the 3rd party plugins disabled.

Hi Olga Kuvardina, it appears that Material Theme is responsible. I removed the plugin and diff-ing works as expected. Do you need any more info to contact the developer?

@..., thanks for checking. Since it's the 3rd party plugin it's better to contact its author or submit an issue on their tracker: https://github.com/ChrisRM/material-theme-jetbrains/issues

Submitted!