the error means you launcher doesn't connect to your api check you httpd.conf api address here is my module, change the red words for your api address
Code:
LoadModule aspdotnet_module modules/mod_aspdotnet.so
# Use the asp.net handler for all common ASP.NET file types
AddHandler asp.net asax ascx ashx asmx aspx axd config cs csproj \
licx rem resources resx soap vb vbproj vsdisco webinfo
<IfModule mod_aspdotnet.cpp>
# Mount the sampleapp example application
AspNetMount /Thelastsoul/api "C:/xampp/htdocs/Thelastsoul/api"
# Map all requests for /sampleapp to the sampleapp application files
Alias /Thelastsoul/api "C:/xampp/htdocs/Thelastsoul/api"
# Allow asp.net scripts to be executed in the sampleapp example
<Directory "C:/xampp/htdocs/Thelastsoul/api">
Options FollowSymlinks ExecCGI
Order allow,deny
Allow from all
DirectoryIndex Default.htm Default.html Default.aspx
</Directory>
# For all virtual ASP.NET webs, we need the aspnet_client files
# to serve the client-side helper scripts.
# NOTICE "C:/Windows/" -- change to %systemroot%
# "C:/Windows/" for WinXP, "C:/WINNT/" for Win2k
AliasMatch /aspnet_client/system_web/(\d+)_(\d+)_(\d+)_(\d+)/(.*) \
"C:/Windows/Microsoft.NET/Framework/v$1.$2.$3/ASP.NETClientFiles/$4"
# NOTICE "C:/Windows/" -- change to %systemroot%
# "C:/Windows/" for WinXP, "C:/WINNT/" for Win2k
<Directory "C:/Windows/Microsoft.NET/Framework/v*/ASP.NETClientFiles">
Options FollowSymlinks
Order allow,deny
Allow from all
</Directory>
</IfModule>