"Error authenticating with the refresh token due to: invalid client credentials" when running "sfdx force:user:create"

Summary

While running sfdx force:user:create I’m getting an error: ERROR running force:user:create: Error authenticating with the refresh token due to: invalid client credentials The user is created though.

Steps To Reproduce:

On any Scratch Org (I tested with the Dreamhouse-lwc repo, I could repro), try tro create a user like this: sfdx force:user:create -f user.json

I’m using a basic user file:

{
    "Username": "[e-mail].1234",
    "FirstName": "Richard",
    "LastName": "Hendricks",
    "profileName": "Standard Platform User"
}

Expected result

The user is created without any error.

Actual result

The user is created, but the command fails with an error.

Additional information

macOS BigSur

@oclif/plugin-autocomplete 0.3.0
@oclif/plugin-commands 1.3.0 (core)
@oclif/plugin-help 3.2.1 (core)
@oclif/plugin-not-found 1.2.4 (core)
@oclif/plugin-plugins 1.9.5 (core)
@oclif/plugin-update 1.3.10 (core)
@oclif/plugin-warn-if-update-available 1.7.0 (core)
@oclif/plugin-which 1.0.3 (core)
@salesforce/sfdx-scanner 2.5.1
@salesforce/sfdx-trust 3.6.0 (core)
alias 1.1.5 (core)
analytics 1.12.1 (core)
auth 1.4.6 (core)
config 1.2.3 (core)
evergreen 0.34.0
└─ evergreen-build 0.20.2
generator 1.1.3 (core)
salesforcedx 50.13.3 (core)
├─ schema 1.0.3 (core)
├─ limits 1.0.2 (core)
├─ user 1.0.5 (core)
├─ templates 50.4.0 (core)
├─ apex 0.1.4 (core)
├─ @salesforce/sfdx-plugin-lwc-test 0.1.7 (core)
├─ salesforce-alm 50.13.1 (core)
└─ custom-metadata 1.0.11 (core)
sfdx-cli 7.84.2 (core)

[FabienTaillon]

Looks like the commands crashing is in sfdx core: https://github.com/forcedotcom/sfdx-core/blob/main/src/user.ts#L349

[FabienTaillon]

I’m closing this one as I got it fixed, even though I don’t know why the connected app changed. I’ll let it up to you to see if this could be the root cause of other open issues. Thanks @WillieRuemmele for the help 👍