ISSUES: Containerized tools in Galaxy platfrom

Hi there, I deploy a galaxy using docker on my own machine, and I follow the instruction (https://docs.galaxyproject.org/en/latest/admin/special_topics/mulled_containers.html) and change the bwa_macros.xml to

<requirement type=“docker”>biocontainers/samtools</requirement>

But I get an error when I used the bwa tools in the galaxy web side. May I ask how to solve this problem?