This error message is generated when the browser cannot resolve a URL.
In Conga, this is generally caused by a malformed url in your Conga Composer button.
Typical causes can include:
- Spaces within the URL
- Spaces at the end of the URL
- Missing an ampersand (&) between parameters
- Using a URL pointing to an invalid server (such as beta vs. www)
What to do
Remove all spaces from the button's URL. If you need to include spaces in a parameter, please use plus signs, which will render as spaces in the Composer merge operation, but will not lead to 404 authorization errors.