This error is from a content filter/firewall block. Do the download from some other, probably not Work site.The two you posted above. This is what I get every time. That is why I asked if there are mirrors somewhere else.
View attachment 299797
Many employers block sites such as Mega.nz to make it more difficult to exfiltrate data if they are hacked or from an insider with lower tech skills who doesn't have their own infrastructure to move large files.