Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string. or ?string(format) built-in with this date.
The problematic instruction:
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==> ${m.overallDue?html} [on line 30, column 15 in com.tle.web.wizard@/wizard/moderation.ftl]
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Java backtrace for programmers:
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freemarker.template.TemplateModelException: Can't convert the date to string, because it is not known which parts of the date variable are in use. Use ?date, ?time or ?datetime built-in, or ?string. or ?string(format) built-in with this date.
at freemarker.core.Environment.formatDate(Environment.java:763)
at freemarker.core.Expression.getStringValue(Expression.java:105)
at freemarker.core.Expression.getStringValue(Expression.java:93)
...