Udemy has announced the following site maintenance, you may want to avoid these dates/times whilst studying.
Announcement
Udemy is planning a routine site maintenance for October 17 and October 24 from 5am-7am PDT. During this timeframe, you may experience downtime and slower site performance. We expect the site to return to normal levels of performance immediately after.
This maintenance is being done to ensure long-term stability and optimal site performance. We apologize for any inconvenience this may cause. If you have any questions, please contact our support center.
The Udemy Team