Integration between angular and qwik involves large amount of dependencies and sometimes something is not working properly with a weird undebuggable error. This document describes some of them and possible reasons
This can be caused by a mismatch between the version of @angular/_ packages and the version @qwikdev/qwik-angular depends on. Typically, you'd see node_modules/@angular/_packages along withnode_modules/@qwikdev/qwik-angular/node_modules/@angular/\*