Untyped function calls may not accept type arguments

i'm trying to send a http post in column of smart table
but it shows Untyped function calls may not accept type arguments.ts(2347) error
`
columns:
{

button: {
title: '',
type: 'custom',
renderComponent: ButtonViewComponent,
onComponentInitFunction(instance) {
instance.save.subscribe(row => {
this.http.post('baseurl/api/partage/list',{})
.subscribe(next=>
{});

});

}}
`
i removed , the error disappeared but it Cannot read property 'http' of undefined