I updated the synagios installer yesterday so it installs on newer synology devices.
I had a couple reports saying that DSM reported that the synagios package was not compatible with the synology platform.
The new synagios installer files are synagios_0.13_installfix_arm.spk or synagios_0.13_installfix_x86.spk, for ARM or x86 respectively.
Apart from the install fix, adding the codes for the newer platforms, the synagios build is exactly the same as before.