Can't open recordings

[Galwad]

I've been regularly opening zoom recordings sent to me over the last year by a yoga teacher.  But in the past few weeks the link fails to open,  leading a message that says that 'The media could not be loaded, either because the server or network failed or because the format is not supported'.  Other people who are on PCs can still open her links. My system is macOS Mojave 10.14.6. Can anyone tell me why this failure is happening and what I can do about it.  Thanks.