[Need help] to install serviio 2.3 in QNAP TS-451+

Hi. I have QNAP TS-451+ with QTS 5.1.6.2722
I can manually install the version of Serviio (Serviio_2.3_x86_64.qpkg) without a digital signature.
When I open Serviio, it opens a tab with the IP of the QNAP followed by "/:23523/console/" but I always get an ERR_CONNECTION_REFUSED.
Is there anything I can do?
I can manually install the version of Serviio (Serviio_2.3_x86_64.qpkg) without a digital signature.
When I open Serviio, it opens a tab with the IP of the QNAP followed by "/:23523/console/" but I always get an ERR_CONNECTION_REFUSED.
Is there anything I can do?