[Error] no matching function for call to ''

This error message typically occurs when the compiler cannot find a function with the specified name and arguments.

For example, if you try to call a function named "foo" with two integer arguments, but there is no function named "foo" that takes two integer arguments, the compiler will generate this error message.

Some possible reasons for this error include:

- The function may not be declared or defined properly.
- The function may be in a different namespace or scope.
- The function may have a different name or signature than what you are using.
- The function may be defined in a different source file that is not being included in the build.
- There may be a typo or other syntax error in the function call.

To fix this error, make sure that the function you are trying to call is declared and defined properly, and that you are using the correct name and arguments. If the function is defined in a different source file, make sure that file is included in the build. Double-check for any typos or syntax errors in the function call.