My deck only works if it includes ETC Band Manager

I’m currently experimenting with the following Paladin deck: ### Handbuffscavate

Class: Paladin

Format: Standard

Year of the Pegasus

2x (1) Drone Deconstructor

2x (1) Righteous Protector

1x (1) X-21 Repairbot

2x (2) Gold Panner

2x (2) Grimestreet Outfitter

1x (2) Instrument Tech

2x (2) Kobold Miner

1x (2) Noble Minibot

1x (3) Deputization Aura

2x (3) Muscle-o-Tron

1x (3) Outfit Tailor

1x (4) Crusader Aura

2x (4) Fossilized Kaleidosaur

2x (4) Painter’s Virtue

2x (4) Tigress Plushy

2x (5) Burrow Buster

1x (5) Leeroy Jenkins

1x (5) Magatha, Bane of Music

1x (8) Prismatic Beam

1x (0) Zilliax Deluxe 3000

1x (0) Zilliax Deluxe 3000

1x (5) Perfect Module

1x (5) Ticking Module

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And at one point it included ETC Band Manager. I decided to switch him out in favor of a few different cards, prismatic beam being the most recent. Ever since I removed ETC Band Manager, I can’t load up a game with that deck. I’ve tried putting him back in and it works fine, and none of my other decks have this issue.

Try putting him back in, removing the cards in his “band”, then take him back out.

Yeah that didn’t work. I’m still getting the error.
Edit: just tried it a second time and it worked. Thanks!