Not able to share screen when my business partner makes me a cohost

I have no problem sharing my screen typically. I have a business partner that makes me a cohost and when I go to share my screen in their meeting the share button is grey'd out so I'm unable to share my screen. Note: Other business partners who are made cohosts can share their screens. Only I am unable to share due to the grey'd out button. Can you help us resolve this? Thank you!