I cannot open certain websites over wifi
I have internet access, but I cannot open certain websites over any wifi connection when using my Macbook. These websites are not small or untrustworthy, and include Disney+, Netflix, Spotify and Amazon. I have tried unsuccessfully on both Firefox and Safari.
I can access the websites over wifi on my iPhone, as can my parents on their iPad. But I can only open them on my Macbook if I am directly connected to the internet by an ethernet cable.
I have removed all the wifi connections and logged back in, which has had no effect.
Can anybody offer advice or a solution?
MacBook Pro 15″, macOS 10.15