how to disable IDE sync settings?

Please go to Preferences | Plugins > Installed tab, find and disable the IDE Settings Sync plugin. Does it help?

That's strange, I don't have an IDE Settings Sync submenu.

Hi!

File > IDE Settings Sync > Disable Sync:

That appears to fix it, thanks!

I have both plugins IDE Settings Sync and Settings Repository enabled but I don´t see any "Sync Settings" stuff under file anymore, not even the "Settings Repository", "Import Settings", "Export Settings" menu points.

In the right bottom corner of the IDE theres an icon saying "Failed to Sync IDE Settings. Click to sync" - when I click on that button nothing happens

@Marianklueh, please click on that button again and after that send the idea.log file (Help | Show Log in ...) to clion-support at jetbrains.com. Note that logs might contain private user's information (like file paths and names). 

I have this same issue:

IntelliJ IDEA 2019.3.3 (Ultimate Edition)
Build #IU-193.6494.35, built on February 11, 2020
Licensed to Yoco Technologies PTY / Nick Jacobs
Subscription is active until March 3, 2020
Runtime version: 11.0.5+10-b520.38 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.15.3
GC: G1 Young Generation, G1 Old Generation
Memory: 4096M
Cores: 12
Registry: ide.editor.tabs.open.at.the.end=true, ide.balloon.shadow.size=0, tabs.alphabetical=true
Non-Bundled Plugins: org.jetbrains.plugins.rest, Pythonid, RegexPlugin, Twelf Plugin, codes.rudolph.idea.cfg, com.demonwav.minecraft-dev, com.jetbrains.CyanTheme, com.jetbrains.plugins.ini4idea, com.paperetto.dash, com.thvardhan.gradianto, com.wix.eslint, intellij.prettierJS, org.intellij.scala, org.jetbrains.plugins.hocon, org.sylfra.idea.plugins.linessorter, ru.adelf.idea.dotenv, ru.meanmail.plugin.requirements

Hello!

The following issue looks related: https://youtrack.jetbrains.com/issue/IDEA-191085. Feel free to comment it or create a new issue in the IntelliJ platform's tracker (https://youtrack.jetbrains.com/issues/IDEA) since it's a platform functionality.