Hello,
as Oinari-sama said, due to the new osu! patch, you are not able to send data when playing in fullscreen. You can use a workaround and play in borderless window mode, simply uncheck fullscreen in your osu! options and choose your desktop resolution.
(Please bear in mind that this might cause different behavior on some machines, performance wise.)
I will write more about this later, when I find the time to do so.
(I am also looking for and working on alternatives.)
However, Stefan's case might be a different problem, if you may, please PM me a screen of your running osu!Post application (and maybe information about your PC).
I will contact you when I am home.
(Please also make sure that osu!Post is not blocked by any firewalls, but under any circumstances, do not disable the firewall completely. You wouldn't detach your door if you only want to let one of your friends inside.)
as Oinari-sama said, due to the new osu! patch, you are not able to send data when playing in fullscreen. You can use a workaround and play in borderless window mode, simply uncheck fullscreen in your osu! options and choose your desktop resolution.
(Please bear in mind that this might cause different behavior on some machines, performance wise.)
I will write more about this later, when I find the time to do so.
(I am also looking for and working on alternatives.)
However, Stefan's case might be a different problem, if you may, please PM me a screen of your running osu!Post application (and maybe information about your PC).
I will contact you when I am home.
(Please also make sure that osu!Post is not blocked by any firewalls, but under any circumstances, do not disable the firewall completely. You wouldn't detach your door if you only want to let one of your friends inside.)