Power-Up unhandled error responding to request for card-buttons

Hello,
Please help in resolving this error whenever I open card with power-up on, please advise.

Power-Up unhandled error responding to request for card-buttons
(anonymous) @ index.esm.js:204
Z @ util.js:26
E._settlePromiseFromHandler @ promise.js:510
E._settlePromiseAt @ promise.js:584
E._settlePromises @ promise.js:700
Bt._drainQueue @ async.js:123
Bt._drainQueues @ async.js:133
Bt.drainQueues @ async.js:15
setTimeout (async)
It @ async.js:79
Bt._queueTick @ async.js:141
Mt @ async.js:70
jt.hasDevTools.Bt.settlePromises @ async.js:105
E._queueSettlePromises @ promise.js:640
E._fulfillUnchecked @ promise.js:655
E._fulfill @ promise.js:554
E._resolveCallback @ promise.js:446
(anonymous) @ promise.js:485
value @ index.esm.js:228
value @ index.esm.js:117
(anonymous) @ index.esm.js:123
value @ index.esm.js:122
listener @ index.esm.js:143
index.esm.js:205 r {stack: "PostMessageIO:UnsupportedCommand: unsupported comm… (https://p.trellocdn.com/power-up.min.js:1:6902)", message: "unsupported command: card-buttons", name: "PostMessageIO:UnsupportedCommand"}
(anonymous) @ index.esm.js:205
Z @ util.js:26
E._settlePromiseFromHandler @ promise.js:510
E._settlePromiseAt @ promise.js:584
E._settlePromises @ promise.js:700
Bt._drainQueue @ async.js:123
Bt._drainQueues @ async.js:133
Bt.drainQueues @ async.js:15
setTimeout (async)
It @ async.js:79
Bt._queueTick @ async.js:141
Mt @ async.js:70
jt.hasDevTools.Bt.settlePromises @ async.js:105
E._queueSettlePromises @ promise.js:640
E._fulfillUnchecked @ promise.js:655
E._fulfill @ promise.js:554
E._resolveCallback @ promise.js:446
(anonymous) @ promise.js:485
value @ index.esm.js:228
value @ index.esm.js:117
(anonymous) @ index.esm.js:123
value @ index.esm.js:122
listener @ index.esm.js:143
index.esm.js:204

Thanks in advance,
Sana

Hey Sana! This means that there is an error somewhere in the function that you’re giving Trello to call for the card-buttons capability.

I’d recommend adding in console logging or debugging of some sort to see where the error is coming from. Is this happening all of the time? Only on a specific board? Only after you take specific actions? Whatever the steps are to produce this message, you’ll want to follow them again after adding in debugging information to see what the problem might be.

As this error is happening inside of your code, is it possible for you to share the function you’re using for card-buttons?

Thanks for replying,
I started debugging, I removed all other powerups except additional fields and my powerup. and I disabled one and kept only one. it seems that additional fields power-up is causing this error, please check!
Thank you!

Just to confirm, the error stopped appearing when you disabled this Power-Up: https://trello.com/power-ups/56d5e249a98895a9797bebb9?