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
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.