Stoken is expired Issue for Captcha

Hi there, I'm having an issue with a captcha on a form for this website. I attached a screenshot. Where the captcha is, it says, 'Error for site owner. Stoken expired.' I went into the backend to update this but it seems everything is up to date. When I view the page on my Mac, it looks normal, but on my phone, I get the error and so do other computers in the office. Some do and some don't. Can you help me figure this out please? And I just granted support access on the backend to the site.

Thank You!
Mark