According to the specification (RFC1738) the character '_' is not allowed in URLs:
Fully qualified domain names take the form as described in Section 3.5 of RFC 1034  and Section 2.1 of RFC 1123
: a sequence of domain labels separated by ".", each domain label starting and ending with an alphanumerical character and possibly also containing "-" characters. The rightmost domain label will never start with a digit, though, which syntactically distinguishes all domain names from the IP addresses.
You can replace the '_' by '-'.
Hey Community mates! Claire here from the Software Product Marketing team. We all know software development changes rapidly, and it's often tough to keep up. But from our research, we've found the h...
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