Data-import addon issue

Hi,
Am trying to save an import configuration but the process does not complete and gives no error (see attached screen shots). The process calls a select from ddcdiImportconfiguration but after that does not proceed.
Selection_260 Selection_259 Client upload.xlsx (8.4 KB)
Also localdatetime field loading produces an error “null value passed” yet I did pass a value in the excel file and in the format defined in the configurations section (sample file attached - Noninvoice payments upload sample.xlsxNoninvoice payments upload Sample.xlsx (8.5 KB) ). What could be the issue?