The wikitext error is preventing replies on Wikipedia's Talk:Founding Fathers of the United States page. I'm not sure if this is the cause, but the problem did not exist before the addition of a fairly large table. Of course, we can still respond to comments using "edit" links, but "reply" links no longer work. Thank you.
Topic on Help talk:Lint errors/fostered
I imagine this was the offending commit, https://en.wikipedia.org/w/index.php?title=Talk:Founding_Fathers_of_the_United_States&type=revision&diff=1100168645&oldid=1100167533&diffmode=source
I made this change and it seems to have fixed it, https://en.wikipedia.org/w/index.php?title=Talk:Founding_Fathers_of_the_United_States&type=revision&diff=1100411571&oldid=1100397454&diffmode=source