gradebook-gbgrade-table.js?version=5b1f2b66:2761 Uncaught TypeError: Cannot read property 'replace' of undefined
    at initializeMetadataSummary (gradebook-gbgrade-table.js?version=5b1f2b66:2761)
    at t.default.<anonymous> (gradebook-gbgrade-table.js?version=5b1f2b66:2853)
    at e.value (handsontable.full.min.js?version=5b1f2b66:29)
    at t.default.runHooks (handsontable.full.min.js?version=5b1f2b66:29)
    at e.<anonymous> (handsontable.full.min.js?version=5b1f2b66:29)
    at handsontable.full.min.js?version=5b1f2b66:29
    at r (handsontable.full.min.js?version=5b1f2b66:29)
    at e.runLocalHooks (handsontable.full.min.js?version=5b1f2b66:29)
    at e.value (handsontable.full.min.js?version=5b1f2b66:35)
    at e.value (handsontable.full.min.js?version=5b1f2b66:35)
initializeMetadataSummary @ gradebook-gbgrade-table.js?version=5b1f2b66:2761
(anonymous) @ gradebook-gbgrade-table.js?version=5b1f2b66:2853
value @ handsontable.full.min.js?version=5b1f2b66:29
runHooks @ handsontable.full.min.js?version=5b1f2b66:29
(anonymous) @ handsontable.full.min.js?version=5b1f2b66:29
(anonymous) @ handsontable.full.min.js?version=5b1f2b66:29
r @ handsontable.full.min.js?version=5b1f2b66:29
runLocalHooks @ handsontable.full.min.js?version=5b1f2b66:29
value @ handsontable.full.min.js?version=5b1f2b66:35
value @ handsontable.full.min.js?version=5b1f2b66:35
i @ handsontable.full.min.js?version=5b1f2b66:29
t.handleMouseEvent @ handsontable.full.min.js?version=5b1f2b66:29
onCellMouseDown @ handsontable.full.min.js?version=5b1f2b66:35
value @ handsontable.full.min.js?version=5b1f2b66:29
value @ handsontable.full.min.js?version=5b1f2b66:29
value @ handsontable.full.min.js?version=5b1f2b66:29
(anonymous) @ handsontable.full.min.js?version=5b1f2b66:29
i @ handsontable.full.min.js?version=5b1f2b66:29