its not work without install material

[mahdi-hajian]

when add this module to import module ==>

Error: Failed to compile entry-point ngx-float-button (es2015 as esm2015) due to compilation errors:
node_modules/ngx-float-button/fesm2015/ngx-float-button.js:375:26 - error NG1010: Value at position 1 in the NgModule.imports of NgxFloatButtonModule is not a reference
Value could not be determined statically.

375 imports: [CommonModule, MatIconModule],
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/ngx-float-button/fesm2015/ngx-float-button.js:375:41
375 imports: [CommonModule, MatIconModule],
~~~~~~~~~~~~~
Unknown reference.