Puzzle 13

Puzzle 13 is one of the mysteries in Islands of Insight.
==Hints==
*The map provides minimal assistance in locating the river fork.
*The broken ring denotes one of the Enclave entrances.
==Solution==
Navigate to the Cloud of Pearls Enclave. Behind the entrance ring, discover a concealed logic box. Resolve it using only symbols, ignoring the "Numbers are off by one" and "connect all dark cells" rules.