error.
Unable to get property 'getDatePart' of undefined or null reference
9WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2 Uncaught TypeError: Cannot read property 'getDatePart' of undefined
at DayPilot.Scheduler.$cW (WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2)
at checkOverlap (WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2)
at DayPilot.Scheduler.$fA (WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2)
at DayPilot.Scheduler.$hB (WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2)
at HTMLDivElement.$fH (WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2)
$cW @ WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2
checkOverlap @ WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2
$fA @ WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2
$hB @ WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2
$fH @ WebResource.axd?d=ZGHsFYV9QGh-_FzYKtGmad5nsoxhSL1_qol39My5zOkrM1ppfEs9uAfo-hActeretizenMk3kZrBKITmdn7MbrWt8TJtQH72mIH-kDG2XFkNMH8hjdbRCLNyNObBUkEEtcs57_VPvrPDrtVMdMzk7g2&t=636607069283393482:2