Cannot access certain topics anymore

[ghost]

/var/www/node_modules/mongoose-simpledb/node_modules/mongoose/lib/utils.js:413
throw err;
^
TypeError: /var/www/views/comment.jade:4
2| div.small {#{comment.id}} #{comment.creator.username}>
3| br

4| div.body!= comment.bodyHtml()
5| br
6| div.sub= comment.dateFromNow()
7| if (comment.editedBy)

Cannot call method 'replace' of undefined
Please report this to https://github.com/chjj/marked.
at Lexer.lex (/var/www/node_modules/marked/lib/marked.js:137:6)
at Function.Lexer.lex (/var/www/node_modules/marked/lib/marked.js:128:16)
at marked (/var/www/node_modules/marked/lib/marked.js:1201:31)
at model.exports.methods.bodyHtml (/var/www/dbmodels/Comment.js:23:16)
at eval (eval at (/var/www/node_modules/jade/lib/jade.js:172:8), :127:67)
at eval (eval at (/var/www/node_modules/jade/lib/jade.js:172:8), :225:4)
at eval (eval at (/var/www/node_modules/jade/lib/jade.js:172:8), :234:21)
at res (/var/www/node_modules/jade/lib/jade.js:173:38)
at exports.renderViewToString (/var/www/utilities/shellFunctions.js:21:12)
at exports.view (/var/www/utilities/shellFunctions.js:27:14)

This happens every time I two specific topics were accessed.
Edit: cannot be replicated anymore, feel free to close