Seem such error is coming with 4.9.x version:
Mixins may not be defined within control directives or other mixins.
Change-Id: I573f9d452b52f1f8bb5aad997d30508106a464fa
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>
"ng2-smart-table": "1.2.2",
"ng2-tree": "2.0.0-alpha.10",
"ngx-cookie": "1.0.1",
"ng2-smart-table": "1.2.2",
"ng2-tree": "2.0.0-alpha.10",
"ngx-cookie": "1.0.1",
"normalize.css": "6.0.0",
"pace-js": "1.0.2",
"popper.js": "~1.12.9",
"normalize.css": "6.0.0",
"pace-js": "1.0.2",
"popper.js": "~1.12.9",