I am playing Brawl on PC and I have built a "Winter Soldier, Icy Assassin" deck. All cards meet the requirement to have Lurrus of the Dream Den" as companion but it will not validate it as such in a game. I have insured that no cards WHATSOEVER are mana value 3 or more despite Lurrus only caring about permanents 2 or less. I have included the decklist below just in case that I am missing something. Please Help!

Commander
1 Winter Soldier, Icy Assassin (MSH) 239

Companion
1 Lurrus of the Dream-Den (MUL) 116

Deck
7 Plains (USG) 333
6 Swamp (MOM) 286
1 Kemba's Outfitter (Y23) 2
1 Sigarda's Aid (SIR) 43
1 A-Plate Armor (AFR) 32
1 Citizen's Crowbar (SNC) 8
1 Cloud, Midgar Mercenary (FIN) 10
1 Delver's Torch (AFR) 10
1 Horn of Valhalla (HBG) 92
1 Honored Knight-Captain (EOE) 22
1 Stoneforge Mystic (SPG) 29
1 Super-Soldier Serum (MSH) 38
1 Lion Sash (NEO) 26
1 Robe of Stars (SPG) 0
1 Sram, Senior Edificer (MUL) 71
1 Rune of Sustenance (KHM) 25
1 Hylderblade (EOE) 106
1 Reaper's Talisman (AFR) 117
1 Vorpal Sword (AFR) 124
1 Barbed Bloodletter (ECL) 86
1 Black Mage's Rod (FIN) 90
1 Dredging Claw (BRO) 119
1 Rune of Mortality (KHM) 108
1 Invasion of New Capenna (MOM) 238
1 Adventuring Gear (FDN) 249
1 Barrow-Blade (LTR) 237
1 Basilisk Collar (HBG) 253
1 Lost Jitte (BIG) 23
1 Colossus Hammer (M20) 223
1 Dragonfire Blade (TDM) 240
1 Prying Blade (XLN) 244
1 Leather Armor (AFR) 248
1 Lavaspur Boots (OTJ) 243
1 Blackblade Reforged (BRR) 6
1 Captain America's Shield (MSH) 244
1 Goldvein Pick (FDN) 253
1 Lightning Greaves (MRD) 199
1 Swiftfoot Boots (TLE) 317
1 Sting, the Glinting Dagger (LTR) 250
1 The Dominion Bracelet (EOE) 239
1 The Irencrag (WOE) 248
1 Umezawa's Jitte (BOK) 163
1 Mox Amber (BRR) 35
1 Mox Opal (SOM) 179
1 Quag Feast (DFT) 100
1 Ripples of Undeath (MH3) 107
1 Takenuma, Abandoned Mire (NEO) 278
1 Dusk Rose Reliquary (LCI) 10
1 Tarrian's Journal (LCI) 126
1 Deadly Dispute (FCA) 33
1 Reno and Rude (FIN) 113
1 Umbral Collar Zealot (EOE) 123
1 Inventors' Fair (KLR) 284
1 Adagia, Windswept Bastion (EOE) 250
1 Adelbert Steiner (FIN) 3
1 Swordsman, Sharp Scoundrel (MSH) 116
1 Whiplash, Vengeful Engineer (MSH) 121
1 Skateboard (TMT) 178
1 Enlightened Tutor (TLE) 305
1 Esper Sentinel (MH2) 12
1 Mother of Runes (ULG) 14
1 General's Enforcer (IKO) 188
1 Grand Abolisher (BIG) 2
1 Lotho, Corrupt Shirriff (LTR) 213
1 Giver of Runes (MH1) 13
1 Skrelv, Defector Mite (ONE) 33
1 Dark Ritual (STA) 26
1 Restoration Magic (FIN) 30
1 Erode (SOS) 15
1 Final Showdown (OTJ) 11
1 Shadowy Backstreet (MKM) 268
1 Shadowspear (THB) 236
1 Sheltered by Ghosts (DSK) 30
1 Kaya's Ghostform (WAR) 94
1 Minas Tirith (LTR) 256
1 Phyrexian Tower (MH3) 303
1 Susur Secundi, Void Altar (EOE) 259
1 Castle Locthwain (ELD) 241
1 Caves of Koilos (DMU) 244
1 Godless Shrine (RNA) 248
1 Temple of Silence (FDN) 704
1 Isolated Chapel (DAR) 241
1 Bloodstained Mire (KTK) 230
1 Command Tower (ANB) 118
1 Muraganda Raceway (DFT) 257
1 Land Tax (WOT) 9
1 Urborg, Tomb of Yawgmoth (PIO) 118
1 Rhys, the Evermore (ECL) 32

Sideboard
1 Lurrus of the Dream-Den (MUL) 116