I'm using Rapid PHP 2025 (18.2.0.265) along with WAMP server (3.3.7),
I have also installed php_xdebug-3.4.0-8.3-vs16-nts-x86_64.dll, which was downloaded through
https://www.blumentals.net/download-php.php
Although I have chosen a random breakpoint, the Run and Debug toolbar shows inactive selections:

when I focus on the index.php tab and click the run button on the Run and Debug Toolbar, Rapid PHP will open
a new tab called untitled.htm which seems to be just an editor, not a debugger.
What do I need to 'fix' so that the debugger might work?
The following are elements that probably affect this:
"C:\wamp64\bin\php\php832xd\php.ini"
[Zend]
zend_extension = C:\wamp64\bin\php\php832xd\ext\php_xdebug.dll
xdebug.mode = debug
xdebug.start_with_request = trigger
xdebug.start_upon_error = yes
;xdebug.log = 'C:\wamp64\tmp\xdebug.log'
;xdebug.client_host = localhost
xdebug.client_port = 9000
Options > PHP Settings
- Path to PHP Executable C:\wamp64\bin\php\php832xd\php.exe
- Open output in editor
- Script Parameters: Blank
- Session Name: Blank
- Port: 9000
- Listen to external sessions: checked