This error means that your settings.json config file has been corrupted or is not correctly formatted for the micro version you are using. Most likely scenario: you ran micro v2.x.x, which changes the setttings.json format, then tried to go back to using v1.x.x.
Solution: rm ~/.config/micro/settings.json Or to start from fresh and wipe all of micro's configuration: rm -r ~/.config/micro
