Hi @Wijnand - thanks for the report, it is well-known that 0.7.0 has an unexpected issue because of the system’s older version urllib3, we are tracking it in this issue: https://github.com/learningequality/kolibri/issues/3028
It’s actually also fixed, so in 0.7.1 (once released), it will work. Meanwhile, try this fix from @lingyi :
service kolibri stop
sudo su kolibri
pip3 install urllib3==1.22
service kolibri start