Server error when saving recipient region

[PG-Momik]

Organization Name: Impunity Watch
Activity Id: 2375
Environment: Dev
Issue: Error 500 when saving recipient region
Url : https://iatipublisher-dev.yipl.com.np/activity/2375#activity_scope

[PG-Momik]

Closing this issue because the issue has been resolved.

Cause:

Branch #885 that was merged in develop was missing some code that registered validation rule, specifically:

        Validator::extend('single_allocated_region_total_mismatch', function () {
            return false;
        });