Can't apply when using gitlab provider

I am using terraform docker image hashicorp/terraform:latest and I define the provider in main.tf as following:


terraform {
  required_providers {
    gitlab = {
      source = "gitlabhq/gitlab"
      version = "3.3.0"
    }
  }
}

provider "gitlab" {
    token = var.gitlab_token
}

when I run terraform apply, I become the following error:

Initializing provider plugins...
- Finding gitlabhq/gitlab versions matching "3.3.0"...
- Finding latest version of hashicorp/aws...
- Finding latest version of hashicorp/gitlab...
- Installing gitlabhq/gitlab v3.3.0...
- Installed gitlabhq/gitlab v3.3.0 (signed by a HashiCorp partner, key ID BC097C3333027B14)
- Installing hashicorp/aws v3.22.0...
- Installed hashicorp/aws v3.22.0 (signed by HashiCorp)
Partner and community providers are signed by their developers.
If you'd like to know more about provider signing, you can read about it here:
https://www.terraform.io/docs/plugins/signing.html
Error: Failed to query available provider packages
Could not retrieve the list of available versions for provider
hashicorp/gitlab: provider registry registry.terraform.io does not have a
provider named registry.terraform.io/hashicorp/gitlab
If you have just upgraded directly from Terraform v0.12 to Terraform v0.14
then please upgrade to Terraform v0.13 first and follow the upgrade guide for
that release, which might help you address this problem.
Did you intend to use gitlabhq/gitlab? If so, you must specify that source
address in each module which requires that provider. To see which modules are
currently depending on hashicorp/gitlab, run the following command:
    terraform providers

I can’t find anything on solving this issue in the documentation.

terraform --version
Terraform v0.14.3