tls: failed to verify certificate: x509: certificate signed by unknown authority

Failed to retrieve available versions for module "eks" (.terraform/modules/EKS/cluster.tf:159) from registry.terraform.io: failed to request discovery document:│ Get "https://registry.terraform.io/.well-known/terraform.json":
tls: failed to verify certificate: x509: certificate signed by unknown authority

Solution: 

Configure ArgoCD provider: with

  insecure    = true           # Ignores TLS errors

See also

• terraform init [ -upgrade | -reconfigure | -backend-config | -get-plugins=false | -verify-plugins=false ], --help, Execution examples, Execution with errors, ~/.terraformrc, required_providers