Every time I try to enter code in my courses, the session expires. Clicking on the Restart Session icon does not resolve the problem.
If you start another DataCamp session in a new tab, with the same account, it will automatically stop the original one. This could manifest itself as a "Your session expired" message.
It can also manifest itself as an "Oops, something went wrong" error message in Projects.
As a first step, make sure you close out additional tabs and windows with a DataCamp session. Once that is done, you should click on the Restart Session icon. If the problem persists, please reach out to the DataCamp Support team by clicking on the Submit a Request option from support.datacamp.com. We'd be happy to help!