You can add a profile photo via the following ways:
Go to "My Profile" and click on edit for "My main information." Click on the plus and this will open your file explorer. Select a photo that follows the guidelines and now you have a profile photo.
On mobile app
When first logging into your event via the mobile app, you will be prompted to add a profile photo.
Click on Add your picture, select the photo you want to have as a profile picture and then crop it (see below). Once the photo has been cropped, you can validate it by clicking on ✓ at the top right of your screen.
If you did not want to add a profile picture during your connection, you can still add one by going to the My Profile tab (the steps are the same on the web platform).
Here, click on the box with your name and then on Edit in the box with your empty profile picture (see below).
You will arrive on the next page and click on the empty circle of your profile photo, you will be able to select a photo and then crop it as explained above.
You can also take a photo (mobile app only) when editing your photo by clicking on "Camera":