One user cannot create subscription inside topic in Azure Service Bus (JavaScript)

One user of my aplication that should create subscription in a specific topic is unable to do so (all of the others can). User is getting error with the following content:

<Error>
<Code>400</Code>
<Detail>The specified resource description is invalid.
 TrackingId:1e75e58c-e002-4092-b9e5-2d00c702d785_G12, 
 SystemTracker:*name of my service bus*:Topic:*name of my topic*, 
 Timestamp:2024-08-16T08:05:54
</Detail>
</Error>

The code that is working successfully for everybody else but for this user is the following:

this._sbAdminClient.createSubscription(
                        `myApp-${user}`,
                        azureSubscriptionId,
                        {
                            autoDeleteOnIdle: 'PT1H',
                        }
                    )

Just to be clear, if I check Azure portal, the topic exists and if I manually create subscription, then receiver works fine.