Unable to save settings : IntelliJ IDEA

I use IntelliJ IDEA 15 and have a problem with the auto-saving. For example I make a new configuration, e.g. Show the line number. When I close IntelliJ and reopen my IDE, it doesn't save my configuration and shows me this message:

Unable to save settings : Failed to save settings . Please restart IntelliJ IDEA

Solution 1:

I get this too (IntelliJ 15.0.5), but only when the "Markdown support" plugin is used. Once a .md file is visualised the error starts appearing.

For future reference current version: 2016.1.20160405.143

Not a very solution-oriented post, but maybe this can help someone further pinpoint the source of the error.

Solution 2:

This workaround allows you continue using "Markdown Support".

Uninstall the latest version of "Markdown Support" and install version "8.0.0.20160127.143.1" from https://plugins.jetbrains.com/plugin/7793?pr=idea. Everything works fine.