Connecting to TeamViewer 14 from iOS 11

When attempting to connect to a PC running Windows 10 Pro, both my iPhone and iPad stick in the "Connecting partner..." screen. I can connect to other computers from both iOS devices, leading me to believe that its a problem with this one machine, however outgoing connections from this machine can be established without a problem. Only incoming connections from iOS devices are proving problematic.

Any help is most appreciated!