developer console 打不开问题

打开 workbench 

https://workbench.developerforce.com/login.php

GET 

IDEWorkspace

/services/data/v46.0/tooling/query/?q=select+id,name+from+IDEWorkspace

DELETE

/services/data/v46.0/tooling/query/?q=select+id,name+from+IDEWorkspace

or

/services/data/v46.0/tooling/sobjects/IDEWorkspace/1de28000003L*（IDEWorkspace）