FullCalendarWithTooltip initClandar fails with 4.1.5

[simasch]

Unfortunately in one application the calendar is not displayed with version 4.1.5

FlowClient.js:197 Uncaught ReferenceError: Calendar is not defined
at FullCalendarWithTooltip._initCalendar (full-calendar.js:137:34)
at FullCalendarWithTooltip._initCalendar (full-calendar-with-tooltip.js:10:9)
at FullCalendarWithTooltip.getCalendar (full-calendar.js:97:18)
at FullCalendarWithTooltip.setOption (full-calendar.js:454:29)
at Object.eval (eval at bu (FlowClient.js:1067:101), :3:11)
at bu (FlowClient.js:1067:166)
at au (FlowClient.js:1016:277)
at $t (FlowClient.js:624:57)
at Fr (FlowClient.js:527:18)
at as.bs [as gb] (FlowClient.js:1076:20456)
at LB (FlowClient.js:985:221)
at Ir (FlowClient.js:1072:303)
at Yr.Zr [as I] (FlowClient.js:1076:20222)
at $k (FlowClient.js:454:29)
at Ar (FlowClient.js:1074:1160)
at Br (FlowClient.js:1055:401)
at Ot.Qt [as Bb] (FlowClient.js:1076:23688)
at oC.pC [as O] (FlowClient.js:1076:36950)
at XMLHttpRequest. (FlowClient.js:633:63)
at Ab (FlowClient.js:468:29)
at Db (FlowClient.js:936:56)
at XMLHttpRequest. (FlowClient.js:670:46)

[simasch]

Please find a reproducible example here: https://github.com/simasch-scratches/datapicker-validation/tree/fullcalendar-issue
Make sure you checkout the branch fullcalendar-issue

[stefanuebe]

Looks like I accidentally removed the {Calendar} import. Never do three things at a time in a place with poor internet and kids around you.

[simasch]

Looks good! Thank you!