Hi,
It appears that 192.168.10.0/24 network is in default inet.0 and there is no route to the destination in inet.0
You may need to use filter based forwarding on the ingress interface fe-0/0/5 to direct outgoing traffic to selected routing-instances.
https://kb.juniper.net/InfoCenter/index?page=content&id=KB17223
Cheers,
Ashvin