Why me ?

Because you look so trustworthy!

No time today : but it's a lack of HTML in 2.50. Then i think it's more Louis task.

I didn't understood the bug report...
Clear steps to reproduce please.

The url :https://manual.limesurvey.org/Quotas
Quota Action:
Terminate Survey: This immediately terminates the survey, and closes the interview.
Terminate Survey With Warning: This warns the participant and allows them to go back.

I chose the option :Terminate Survey With Warning. But there are no buttons to go back.

My English is very poor.I don't know how to explain.

ok thank you

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=19363

Thank you for your fixed. I have tested it. But It not working well.
When the quotas is full,the button 'MOVEPREVBUTTON' is not show.

Hi, how did you tested the fix? With a git pull?
Here, with your LSS file, I have the previous button.

I edited the survey with the demo.
https://demo.limesurvey.org

And I made a modification to the local code in the file 'frontend_helper.php'.

mod - application/helpers/frontend_helper.php

well, the only thing I can tell is that here, now, I have the previous button.
You should try to download frontend_helper from the GitHub repository and to replace your local one.
Thank you very much for testing.

Version 2.50 Build 160613 released