Alejandro Gutiérrez Alzate
Dear Maja,
I checked your account but I didn't find any problem with it, in fact I was able to save a test entrance for day 9th of the Self Development Program, you can just replace the text that's written already and change the date so you can save your progress. Please try again and don't forget to always fill in all the information, if that doesn't work Sign-out, clear the browser's history (including cookies, images, etc.) and then Sign-in again.
You can also try updating your browser to the latest version or try a different browser to check if that solves the problem.
Also please download the latest version of java, you can do it from the following link: https://www.java.com/en/
In case the aforementioned doesn't work please write us back attaching a screen capture of the error.
PIPO, Alejandro.