"Error: idna: disallowed rune U+0009" Encountered When Using the TFE Provider

Problem

When executing Terraform configuration code that includes the use of the tfe provider, you encounter the error below during the plan phase:

 Error: Failed to initialize HTTP client
│ 
│ with provider["registry.terraform.io/hashicorp/tfe"],
│ on main.tf line 10, in provider "tfe":
│ 10: provider "tfe" {
│ 
│ idna: disallowed rune U+0009{

Cause

• This occurs when the value for the hostname argument, or TFE_HOSTNAME environment variable set for use by the tfe provider, contains a horizontal TAB character at the end of the address entered.

Other common unicode numbers for white space related characters you might encounter in the error message are:

• U+0020
• U+000A

Solution:

• Remove the extra space character(s) from the end of the address that's set for the hostname argument, or TFE_HOSTNAME environment variable.

Additional Information

• https://registry.terraform.io/providers/hashicorp/tfe/latest/docs#hostname

• http://www.unicode-symbol.com/u/0009.html
• https://www.compart.com/en/unicode/category/Zs