Many topics already here about this! Any chance that it could be solved soon? Using Firefox …is it the reason? But I also tried MS Explorer - same problem
What course? Please provide links and levels.
It could be, that the course level does not use two columns.
Usually it fails if there is only one column definition and missing the second.
Could this be for your course?
I tried it in Firefox, Explorer and Chrome…
Here is the correct link: https://www.memrise.com/course/1552091/portugiesisch-mit-system-langenscheidt/
All words of 15 levels seem to have two column definitions; so no, this is NOT the well-known error.
Q: Have you clicked on LEARN or REVIEW?
Q: Why don’t you simply open your Firefox browser web console with F12 hotkey and paste the red error JS message which you receive?
If you would provide the exact level, I could try learning and reviewing it for myself (and try to replicate the JS error).
Thank you for your patience - may be there is still a misunderstanding. See below the status of my learning. Review works, the error occurs when I click on “weiterlernen” (keep on learning - see the green button in the before sent image) to get the next level.
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