From the error message, it looks like latex2html (l2h), i.e. typeset
mode, is not working properly. Actually you probably want to use
typeset2 (dvipng) if you can.What's happening is that when you
select a set, it brings up a header file (screenHeader) in the default
mode and, in your case, something is going wrong with that process. Try
this. Edit the file .../webwork/system/lib/Global.pm changing
$htmlModeDefault to HTML as below.
# The default rendering mode for onscreen problem display:
# 'HTML' = raw TeX source
# 'HTML_tth' = HTML formatted with TTH
# 'HTML_dpng' = HTML formatted with LaTeX/dvipng
# 'Latex2HTML' = Images generated by LaTeX2HTML
$htmlModeDefault = 'HTML'; ## we recommend setting this to 'HTML_dpng'
Then when you get to the problems you can select what viewing mode you want.
Try them all and see which work on your system. Then you can work on debugging those that don't.
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