Amount of free runs depends on day you are checking it.
Since today, it should work fine.
Below you can find a list of free entries in specific day day.
Monday
Steadfast Mirror heart of the Ocean (2)
Steadfast Mirror Shrine (8)
Steadfast Mirror Dreamworld (14)
Dynamic Mirror Wyrm Lair (16)
Mystical Mirror Crypt (21)
Tuesday
Dynamic Mirror Shrine (1)
Dynamic Mirror Caves (7)
Dynamic Mirror Sewers (13)
Mystical Mirror Hall (18)
Steadfast Mirror Castle (20)
Wednesday
Dynamic Mirror Altar (4)
Dynamic Mirror Corridor (10)
Mystical Mirror Nest (12)
Dynamic Mirror Laboratory (19)
Steadfast Mirror Castle (20)
Thursday
Steadfast Mirror Ruins (5)
Steadfast Mirror Chamber (11)
Mystical Mirror Pirate Ship (15)
Dynamic Mirror Wyrm Lair (16)
Mystical Mirror Crypt (21)
Friday
Steadfast Mirror heart of the Ocean (2)
Mystical Mirror Tower (6)
Steadfast Mirror Shrine (8)
Dynamic Mirror Corridor (10)
Dynamic Mirror Sewers (13)
Mystical Mirror Hall (18)
Steadfast Mirror Castle (20)
Saturday
Dynamic Mirror Altar (4)
Mystical Mirror Fortress (9)
Steadfast Mirror Chamber (11)
Mystical Mirror Nest (12)
Steadfast Mirror Dreamworld (14)
Steadfast Mirror Library (17)
Dynamic Mirror Laboratory (19)
Sunday
Dynamic Mirror Shrine (1)
Mystical Mirror Water Cave (3)
Mystical Mirror Tower (6)
Mystical Mirror Fortress (9)
Mystical Mirror Pirate Ship (15)