I get below error while trying to add an connection for a developer SFDC org.
It was working fine previously. however today when it was not working, i tried reconnceting and then re-adding org which resulted in following error.
Posted 03 Apr 2018
Thank you for contacting us on this.
A reason for the issue is that the SFDX service hangs.
In this case, I kindly ask you to open your Task Manager - > Processes, find 'node.exe' entries, and end all these tasks.
After this, please check if the issue would be reproduced.
Please let me know if this would help and if you would have any additional questions - I'll be happy to answer them.
The Welkin Suite