Add troubleshooting guide for incorrect absoluteURL configuration

[nmbazima]

Description

Added a troubleshooting tutorial documenting an incorrect absoluteURL configuration issue encountered during a Windows 11 AMPPS installation.

The guide explains:

• Symptoms of incorrect URL generation
• How the incorrect absoluteURL value caused module 404 errors
• The correct URL format
• Recommended troubleshooting steps

Reason for contribution

This documentation is intended to help administrators installing Gibbon in local Windows environments avoid common configuration issues.

Testing

Verified the solution by correcting the absoluteURL value and confirming that all modules loaded correctly.

[pli888]

Hi @nmbazima

I can see similar problems in Gibbon when I install it on Windows 11 using XAMPP.

It looks like the http://localhost\gibbon value for absoluteURL originates from the step below during Gibbon installation on Windows 11 due to an incorrect default Base URL containing a backslash:

The navigation problems go away when installing with http://localhost/gibbon as the Base URL value.

I will update the Gibbon installation tutorial for Windows 11 so that users need to be aware of inputting the correct value for Base URL, e.g. http://localhost/gibbon instead of the default http://localhost\gibbon value.

I will also create a new Github issue for the Gibbon installer to provide a more correct Base URL value when installing on Windows instead of http://localhost\gibbon.