Fixing Session Expiration Connection Errors in dataloader.io

Solution

The solution for the "The session for this connection has expired" message with dataloader.io is to refresh the connection session. To do this, please, follow the steps below:

1. Check which user is set on this task by opening the task wizard (click on the pencil icon). In the wizard, the first field is the "Connection". Check on that field which username is selected, then click cancel (bottom right corner).
2. Click on your username (top right corner) and then Settings.
3. Go to the Connections tab (on the left menu).
4. Click on New Connection > Salesforce.
5. Depending on your Salesforce Organization settings, you might need to check the "I have a custom Salesforce domain" and then enter your domain (yourdomain.my.salesforce.com). Then click on Login with Salesforce.
6. A pop up window will open where you will need to enter username and password for the same account which is set for the task (the one you validated on step 1). And then click on Log in.
7. If the credentials are correct and the user configuration is correct too, you won't observe any change or message but the user session will be renewed.

After following the steps above, the task should start running properly again. In case it is still failing and any other connection is used on that task (like a FTP or SFTP) you should follow the same steps as above but for that other connection (New Connection > FTP/SFTP/Box/Dropbox > Enter credentials and any other needed detail to renew that connection too.