Whiteboard Collaboration

Can anyone help me with Whiteboard Collaboration? I want to use Zoom whiteboard to teach my online lessons but I cannot work out how to give participants 'edit' access. I've tried by opening the whiteboard in the meeting and checking the 'allow users to collaborate' box but the participant either gets an error message or the whiteboard opens as view only. It's really frustrating as I assume that collaboration is the whole point of the whiteboard?! I'd like my students to be able to write onto it. When I go into my settings the 'whiteboard sharing default' has the access level set to 'viewer' with 'commenter' and 'editor' greyed out. Please help me!!!!