In Ludum your are able to import a file into a Ludum session. If you are having issues with importing files from Garmin via the dropdown in the app or web. This guide will help you import the data manually from the Garmin Connect website into the Ludum website.
Before you can import the file you need to have the following completed.
A session in Garmin Connect
A session in Ludum
In order to add the file into Ludum we need to download the file from Garmin Connect.
In Garmin Connect
Go to the session that you would like to import in Garmin Connect
Select to see the full details of the session
In the top right hand corner there is a cog to open the settings of the session
Export the session to TCX or to GPX
This file will be used in Ludum.
Go to the session that you would like to import data to in Ludum
Press import data
In the slider you will see a button to upload a file, press this button.
Choose the file downloaded from Garmin Connect, and import.
The file should be now imported into Ludum.