title: export materialmodule was not found in angular/material
body: <p>I installed <a href="https://github.com/isaacplmann/ngx-tour" rel="noreferrer">https://github.com/isaacplmann/ngx-tour</a> module and integrated as per guidelines but I am getting <code>export materialmodule was not found in angular/material</code>  and other same kind of errors on npm start or build. what could be the issue here and how can it be resolved. I already have checked the packages and they all are installed.</p>
  
  <p>Thanks</p>