Nebular is messing up with angular material.

mat-select and date-picker stop working when I am using nebular.

Getting this error on clicking on material components

ERROR TypeError: Cannot read property 'appendChild' of undefined
at NbOverlayContainerAdapter._createContainer (index.js:2006)
at NbOverlayContainerAdapter.getContainerElement (overlay.js:741)
at Overlay._createHostElement (overlay.js:2649)
at Overlay.create (overlay.js:2616)
at MatDatepicker._createPopup (datepicker.js:2612)
at MatDatepicker._openAsPopup (datepicker.js:2583)
at MatDatepicker.open (datepicker.js:2502)
at MatDatepickerToggle._open (datepicker.js:3281)
at MatDatepickerToggle_Template_button_click_0_listener (datepicker.js:3315)
at executeListenerWithErrorHandling (core.js:14296)