Provider failed after apply

[sipungora]

I just followed this instruction.

lightstep_stream.my_stream: Creating...
╷
│ Error: Request cancelled
│ 
│   with lightstep_stream.my_stream,
│   on main.tf line 16, in resource "lightstep_stream" "my_stream":
│   16: resource "lightstep_stream" "my_stream" {
│ 
│ The plugin.(*GRPCProvider).ApplyResourceChange request was cancelled.
╵

Stack trace from the terraform-provider-lightstep_v1.84.4 plugin:

panic: interface conversion: interface {} is nil, not string

goroutine 78 [running]:
github.com/lightstep/terraform-provider-lightstep/client.CustomDataConvert(...)
        github.com/lightstep/terraform-provider-lightstep/client/streams.go:54
github.com/lightstep/terraform-provider-lightstep/client.(*Client).CreateStream(0x14000468d00?, {0x1012a3108, 0x1400053dad0}, {0x140004601e0, 0xa}, {0x1400058a0a0, 0x1b}, {0x140000dc210, 0xa4}, {0x140004a1ff0, ...})
        github.com/lightstep/terraform-provider-lightstep/client/streams.go:81 +0x580
github.com/lightstep/terraform-provider-lightstep/lightstep.resourceStreamCreate.func1()
        github.com/lightstep/terraform-provider-lightstep/lightstep/resource_stream.go:62 +0x174
github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource.RetryContext.func1()
        github.com/hashicorp/terraform-plugin-sdk/[email protected]/helper/resource/wait.go:27 +0x48
github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource.(*StateChangeConf).WaitForStateContext.func1()
        github.com/hashicorp/terraform-plugin-sdk/[email protected]/helper/resource/state.go:110 +0x144
created by github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource.(*StateChangeConf).WaitForStateContext
        github.com/hashicorp/terraform-plugin-sdk/[email protected]/helper/resource/state.go:83 +0x1a4

Error: The terraform-provider-lightstep_v1.84.4 plugin crashed!