You can add member's photo either by uploading a file from your computer or taking a snapshot via a web camera.
1. Uploading from computer
In the Upload Member's Photograph field, click on Choose File. Select the file to upload and click Open and finally Save. The member's photo will start displaying in the Member Profile page.
2. Take photo via web camera
To take photo via web camera, we need to turn on the browser camera permission. To turn on the browser camera permission, select the View Site Information icon next to the URL at the top of Chrome and choose Site Settings. Select Allow for Camera option.
Refresh the page for the changes to take effect.

Sometimes, even after updating the photo you may keep seeing the old photo. This is because the browser is fetching data from it's cache. To refresh cache, for Windows press Ctrl + Shift + R and for Mac press command + shift + R