# Unlock Protocol support
**URL:** https://community.metamask.io/t/unlock-protocol-support/28955
**Category:** General
**Created:** [May 16, 2024, 10:03pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955 "2024-05-16T22:03:16Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@bestape](https://community.metamask.io/u/bestape)
#### Post date: [May 16, 2024, 10:03pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/1 "2024-05-16T22:03:16Z")
Hello MetaMask Support,
I’m opening this topic for Unlock Protocol support in general, but my specific issue is an estimated changes error.
Here’s the error:
The transaction worked though [OP Mainnet Transaction Hash (Txhash) Details | OP Mainnet Etherscan](https://optimistic.etherscan.io/tx/0xc421d20753a4feb95b07e0e78fb5646c1de0cca32c3f6868f984b601ed217897) .
Can you fix the error? If so, when? It’s interfering with ticket sales.
Thank you,
Kyle
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### Author:  [@barbara](https://community.metamask.io/u/barbara)
#### Post date: [May 16, 2024, 10:32pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/2 "2024-05-16T22:32:19Z")
Hey @bestape, thanks for reporting this issue! Do you have repro steps we could use to reproduce this issue on our side?
This will help us investigate what is happening and fix it more quickly.
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### Author:  [@bestape](https://community.metamask.io/u/bestape)
#### Post date: [May 16, 2024, 10:45pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/3 "2024-05-16T22:45:59Z")
Hey! Thank you for the quick reply. I shared the link to the tx that caused the estimate error above but if you’ve got 66USDC on Optimism you can test directly at https:// app. unlock-protocol. com/event/mcon-iii .
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### Author:  [@barbara](https://community.metamask.io/u/barbara)
#### Post date: [May 16, 2024, 11:02pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/4 "2024-05-16T23:02:40Z")
Thank you! We’re going to investigate what is happening and report back.
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### Author:  [@bestape](https://community.metamask.io/u/bestape)
#### Post date: [May 17, 2024, 2:47am UTC](https://community.metamask.io/t/unlock-protocol-support/28955/5 "2024-05-17T02:47:33Z")
From Julien at Unlock Protocol, he’s made a simple link to help you debug https:// app.unlock-protocol .com/checkout?id=08d60a57-85fb-477f-ae92-bd6f5aaf6560
If you need Sepolina USDA https:// faucet.circle .com/
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### Author:  [@barbara](https://community.metamask.io/u/barbara)
#### Post date: [May 17, 2024, 3:01pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/6 "2024-05-17T15:01:23Z")
For visibility, we’re working on a fix here: [fix: incorrect token balance changes for simulations of multiple tokens that include an NFT mint by dbrans · Pull Request #4290 · MetaMask/core · GitHub](https://github.com/MetaMask/core/pull/4290)
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### Author:  [@barbara](https://community.metamask.io/u/barbara)
#### Post date: [May 18, 2024, 3:11am UTC](https://community.metamask.io/t/unlock-protocol-support/28955/7 "2024-05-18T03:11:45Z")
We should rollout a fix for this issue next week. I’ll share more visibility on the expected timeline once it’s available.
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### Author:  [@barbara](https://community.metamask.io/u/barbara)
#### Post date: [May 27, 2024, 11:40pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/8 "2024-05-27T23:40:17Z")
We’ve started rolling out a fix for this as part of v11.16.0 release.
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### Author:  [@system](https://community.metamask.io/u/system)
#### Post date: [June 15, 2024, 10:03pm UTC](https://community.metamask.io/t/unlock-protocol-support/28955/9 "2024-06-15T22:03:36Z")
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