Below given are the most probable reason for this error.
1. The Phase 1 proposals do not match.
2. The IP address specified for the (remote) gateway is in correct.
3.The external-interface is in correct.
4 .The dynamic entry specified for the (remote) gateway is incorrect.
From your config I can eliminate the first 3 possibilities . To make sure 4th is not an issue can you add below config and check.
Node0
set security ike gateway IKE_Gate remote-identity inet 212.48.226.93
Node1
set security ike gateway IKE_Gate remote-identity inet 212.48.226.94
commit the changes and then check the tunnel status.
If this don’t fix, please share the complete kmd logs and "show security ipsec inactive-sa" output
Ref:
https://kb.juniper.net/KB10101https://kb.juniper.net/KB30548