completed lessons not counting towards daily tally
Does anyone else find that, from time to time, you complete a lesson and duolingo freezes and then returns you to the main page having failed to log a completed lesson against the daily requirement?
Check your own internet
Freezing is a well-known behaviour of Duolingo in outdated browsers (like Internet Explorer) and outdated versions of Operating systems.
Duolingo prefers the most recent version of the Google Chrome browser. Personally, I prefer the Firefox browser.