js error

[jdyach]

l moved the site to a newer version of PHP, everything was previously working fine. Now getting this error. The thead loads, but no tbody:

Uncaught TypeError: Cannot read property '3' of undefined
at multisort (jquery.tablesorter.min.js?ver=4.9.8:614)
at HTMLTableElement. (jquery.tablesorter.min.js?ver=4.9.8:828)
at HTMLTableElement.dispatch (jquery.js?ver=1.12.4:3)
at HTMLTableElement.r.handle (jquery.js?ver=1.12.4:3)
at Object.trigger (jquery.js?ver=1.12.4:3)
at Object.a.event.trigger (jquery-migrate.min.js?ver=1.4.1:2)
at HTMLTableElement. (jquery.js?ver=1.12.4:3)
at Function.each (jquery.js?ver=1.12.4:2)
at a.fn.init.each (jquery.js?ver=1.12.4:2)

using:
jQuery(".tablesorter").tablesorter({
sortList: [[3,1]],
headers: {
3: {
sorter:'contrast'
},
5: {
sorter:'removeNumber'
}
}
});

Any insight?

[jdyach]

If I use only jQuery(". tablesorter").tablesorter(); same issue with no tbody, but no js errors.