Hello, and sorry for the delay.
There are a few cases where breakpoint cannot be hit in PHP, the full list with examples can be found at https://docs.devsense.com/en/vs/debugging/breakpoints#known-issues
Also, the file path of the debugged script file must match with the one opened in the editor.
The breakpoint has to be put on a statement usually. If you'd have more details about the code, please let us know.