Here are the steps you need to configure tempo on your cloud instance:
If you are on server and have installed tempo on your instance. You don't need any additional configuration steps from the add-on side, it will automatically take effect.
Go to Manage Apps and open Timesheets, then click on Configure
Choose API Integration from the sidebar menu, then click on New Token button
Enter a name for your API Token and click Confirm
Copy your API token and use it in OTJ's configuration
You will need to log in with your Jira credentials
Go to the settings page
Make sure the "Enable Tempo API in log work" field is enabled
Once you put your API token in the field, you can use your tempo log work