Getting ‘cannot verify server identity’ only on wireless LAN. Is this a MITM attack?

I am getting the notification ‘Cannot verify server identity’ for every single website I try to open on an iPhone. This, however, only happens when connected to a certain WLAN.
On mobile internet this does not show up.
I already have reaso… Continue reading Getting ‘cannot verify server identity’ only on wireless LAN. Is this a MITM attack?