Windu ERROR

Syntax error in template "eval:- Trager hochgezogen
- Bodenspante..." on line 8 "{{mailto address="stanislaw.drutel@amg.pl" extra="class="btn-catalog link2"" encode="javascript" text="{{L key="editable.front.zapytanieprodukt"}}" subject="{{$page->name}}" }}" - Unexpected "btn", expected one of: "}}"