Microsoft Forms link not opening

trying to open the link to MS forms which was created by an ex-colleague who has left the organisation. it worked for a while but now i get the above error message (screen shot)

Link is:

https://forms.office.com/Pages/DesignPage.aspx?fragment=FormId%3DI_dP1KdPXkCvwEPCHlcwQ-XUxIEI8ZxFvLEYvzc95MpUMzBBWEVPUE5HUVZPSjZZUUw1OTAyR1QzMi4u%26Token%3D68260c702f9f4d55bca779b07e0ab061

What could be the reason?