Same issue
each time I play this bug appears
I just subscribe for memrise yesterday to learn 
Username: emiinyaaaaan
Course: Shin Kanzen Master N2 Kanji
PC Windows 10 Chrome
Hi, I have the same problem in level 10 of my course Trigedasleng Trigedasleng - by MarvelOClay - Memrise
I’m using Chrome and the error pops up after pressing the “learn new words” button.
Hi all, it seems like you are all experiencing the same problem. When a course creator has accidentally left some columns blank when adding items, the system will return this error.
@18lujaynaha @miinanyaaaaan @mattwyatt123 Please try the courses you mentioned again as it should now be fixed.
@LoraKomSkaikru I’m afraid there’s several missing translations in this course from level 6 onwards, which the creator will need to complete in order for this to function well. It doesn’t look like they are active on the community, so I’d recommend choosing a different course for this language.
If you keep experiencing this problem, we’d recommend first seeing if you can reach out to the course creator in the forum by tagging them and asking them to double check through their course to see if there is any gaps/missing translations 
I am also having the same issue. I believe since it says I need one word left and it is a word that is in another level, that it glitches and does not know that I already learned the level, thus marking the level as incomplete, when I learned all the words already.
Same issue in Memrie’s French I course.
Yesterday this happened occasionally. Today it’s consistent.
I have tried. Memrise is the course creator.
It’s more than a little frustrating to have paid for a year and then not be able to complete my first course.
@rosquet42 If you are learning an official Memrise course, you will need to refer to this thread or our FAQ page which explains how to resolve this issue.
Do you mean a teaching column blank (as the system provides lots of columns and only two may be used) OR
do you mean an item (ie line entry) in a pair being tested?
Hi @DW7, sorry for not being clear. The error occurs when either a whole line is left blank, like this:
and/or when one of the items is missing a translation, like this:
Please use the following template to provide all the requested details and help us investigate faster.
- Description of the issue: cource Tweede Ronde : Nederlands voor buitenlanders - words and phrases 25 and 26 error message “sorry there was an error loading the session” appears
- Your device and browser details android + iOS
- Description of steps to reproduce the issue mentioned above
- Do you have any screenshots of the problem? Please upload them here.
Hi @maciaszekw1706, thanks for your report. I’ve moved it to this thread as the issue is the same as above. Unfortunately, the course creator has missed out several English translations in level 26, which they will need to complete in order for this to function well. It doesn’t look like they are active on the community, so I’d recommend ignoring all items in level 26 in order to complete the course.
Hi
I am a student and to finish my course i have to finish reviewing this level. Could someone on the memerise team fix this cause this isn’t just for me it is for everyone in my school.
Please use the following template to provide all the requested details and help us investigate faster.
- Description of the issue: Please describe the issue in detail. e.g. do you see an error message? What is the issue preventing you from doing do? What should be the expected behaviour? Does this happen only on certain courses, levels, items, learning modes or devices?
I encountered a learning glitch in this course (please see screenshot below). Pretty much all the words in the level are learned and when you click the “continue learning” button, a typical error displays.
- Your device and browser details
I’m using Chrome.
- Description of steps to reproduce the issue
- Do you have any screenshots of the problem? Please upload them here.
Hi @ekoi1995, I’ve moved your issue here as it is a known bug. Unfortunately, the course creator has missed out several English translations in level 21, which they will need to complete in order for this to function well. It doesn’t look like they are active on the community, so I’d recommend ignoring all items in level 21 in order to complete the course.
You can read a more detailed explanation here.
I’m getting the same message on my Welsh course. Tried various welsh courses with same result;speed review, learn new words all result in same message. I’ve logged out and back in again with no change. When trying to report the bug, it asked me to create a new account and sent me an e-mail to confirm it??!!
I’m using Firefox
Any help appreciated
Hi @CazHarris, this sounds like there may be an issue with the browser you are using if none of your lessons or modes are launching.
Are you able to test a few things:
- Please make sure AdBlock, AdBlocking technology or Ghostery have been disabled
- Clear cache and cookies
- Enable Javascript
- Disable any active extensions and/or userscripts
- Ensure your browser is updated, and restart it
- Can you try loading the session in Google Chrome?
- If Chrome fails, can you try loading the session in incognito mode?
If you are still having trouble logging in to your original account, please send us a DM and we’ll look into this 
Hello!
My login is a-s-a-999 and I faced with the mentioned problem (An error with code 500 ) while learning new words 4 or 5 days ago and every time I try to learn new words it appears again and again… The course is: Французский (разговорные фразы) - by Lenotchka - Memrise
I use OS Widows 10, Opera browser.
What would you you suggest me to do?