Could not find a package configuration file provided by "Qt5X11Extras"

The error message "Could not find a package configuration file provided by "Qt5X11Extras"" indicates that the required package configuration file for Qt5X11Extras is missing or not installed on your system.

To resolve this issue, you can try the following steps:

1. Make sure you have installed the necessary development packages for Qt5X11Extras. You can use your package manager (such as apt, yum, or pacman) to search for and install the required packages. For example, on Ubuntu, you can run the following command:

   sudo apt-get install libqt5x11extras5-dev

2. If the package is already installed, check if the package configuration file is present. It should be located in a directory like `/usr/lib/x86_64-linux-gnu/cmake/Qt5X11Extras/Qt5X11ExtrasConfig.cmake`. If the file is missing, reinstalling the package might help.

3. Make sure that the directory containing the package configuration files is included in the `CMAKE_PREFIX_PATH` environment variable. You can set this variable in your CMakeLists.txt file before calling `find_package(Qt5X11Extras)`. For example:

   set(CMAKE_PREFIX_PATH "/path/to/Qt5X11Extras" ${CMAKE_PREFIX_PATH})

4. If you have installed Qt5X11Extras manually or in a non-standard location, you can specify the path to the package configuration file directly by setting the `Qt5X11Extras_DIR` variable in your CMakeLists.txt file. For example:

   set(Qt5X11Extras_DIR "/path/to/Qt5X11Extras/lib/cmake/Qt5X11Extras")

Try these steps and see if they resolve the issue. If not, please provide more information about your system and development environment so that I can assist you further.