A stable connection to the internet is important. In case you use your mobile, make sure to connect via wifi.
It often helps to try another webbrowser (e.g. Safari, Chrome, Firefox), or to update the browser to the latest stable version.
Here we also provide an alternative possibility to create your photo mosaic:
Our team is happy to help!
We are looking forward to create you photo mosaic! In case of any question, send us an email: firstname.lastname@example.org.