Hi,
I have the same problem.
For me the workaround doesn't work.
I'm running Windows 10 64bit. A visit to https://get.openlp.org/ in IE, Edge, Chrome, reboot, reinstall etc. doesn't work.
I've checked the Firewall too. My laptop is based on a Clevo Chassis, with maxed out RAM and i7 8-core processor.
Maybe it'll work in Church on an iMac, but testing it at home home on my laptop at present a no-no. The internet connection is good and achieved speeds in excess of 100mb/s.
Any help wold be much appreciated.