Cannot click on specified element on UI-Windows Tree using G1ANT Robot

I'm trying to use UI addon command-click. After looking for an element in windows tree I decided to use that tool to choose a specific button, which opens in the dialog window on my desktop application. Unfortunately, it wasn't working in the main script -> sometimes it clicked, but not on the button itself, it chose the point outside of the dialog box. The tricky part is that line worked, but in different robot file, I placed only one line, exactly the same and it used to work. Today none of the above works...

The error it's giving me sounds like this: "Access denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)" do somebody knows how to make it work properly?

I tried switching on/off addons, focusing on different windows, different delays, changing scaling from windows side, etc.

The line I'm using: ui.click wpath "path to element from UI tree" Also, res. of the screen is 1920x1080p

I can use image recognition on that part of my script, but if it's in the UI windows tree it should work correctly right?

The path could change, check whether you use any properties that could be dynamic (like @id). Consider using keyboard command if the button is focusable or has assigned a keyboard shortcut.