I get a 500 jquery::ui not found error if I use the Bootstrap 5 T4 template on this page... if I turn on error reporting it tells me it's from /public_html/libraries/src/HTML/HTMLHelper.php (149)
I reported to DP Calendar developer - but they think it's to do with T4 because when I switch the template style to default Cassiopeia, then it works ok.
Does this look like a T4 issue? Thanks!