Hi @AnnaK,

Could you also test this code?

<button mdbBtn color="primary" class="waves-light" type="button" (click)="test.toggle()" mdbWavesEffect>
  Toggle collapse
</button>

<div class="" mdbCollapse #test>
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    keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.</p>
</div>

But code with #test="bs-collapse" not made for me any errors. Could you tell me how I can reproduce this error?

Best, Konrad.