Why do the python and javascript courses stop opening their units after fourth one?

Question

none

Answer 1

Do you use the main app or separate apps for each course? As long as I remember, this can happen if you use separate ones. Try to install the main app:
https://play.google.com/store/apps/details?id=com.sololearn

Answer 2

I'm not sure what you are referring to as I can't replicate the issue from my account, but if you're experiencing technical difficulties, you can always reach out to SoloLearn directly by e-mailing them at [e-mail].