The explanation shown when a sync is blocked by a Read rule now also covers the case where a sandbox read-deny setting is the cause, and likewise for cases where the rules can't be read.
Sandbox/Read-rule denial messages now mention sandbox settings
Read-rule denial messages now also mention sandbox settings as a possible cause.
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SandboxArea: what it touches
ImprovementsKind: in v2.1.260,
ImprovementsSection of the release