imgui-sfml: imgui IM_ASSERT(g.FrameScopeActive) failure

Compiler: Visual Studio Community 2019 (MSVC 16) Operating System: Windows 10 64-bit

My Issue/Question:

When running my application in x64-Debug I get: Assertion failed: g.FrameScopeActive, file C:\vcpkg\buildtrees\imgui\src\v1.73-a85d24b4b8\imgui.cpp, line 5400 only when I add ImGui::Begin and ImGui::End calls to my source file.

I am attempting to start a new C++ project using vcpkg, CMake, and Visual Studio on windows. I installed the following packages through vcpkg:

• imgui-sfml:x64-windows v2.1
• imgui:x64-windows v1.73-1
• sfml:x64-windows v2.5.1-4

In my CMakeLists.txt I include the following:

...
find_package(SFML CONFIG COMPONENTS REQUIRED windows graphics system)
find_package(imgui CONFIG REQUIRED)
find_package(ImGui-SFML CONFIG REQUIRED)
...
add_executable(main app/main.cpp)
target_link_libraries(main
                                PRIVATE imgui::imgui
                                              ImGui-SFML::ImGui-SFML
                                             sfml-system
                                             sfml-window
                                             sfml-graphics)

My main.cpp file consists of the following:

#include <imgui.h>
#include <imgui-SFML.h>

#include <SFML/Graphics/RenderWindow.hpp>
#include <SFML/System/Clock.hpp>
#include <SFML/Window/Event.hpp>

int main()
{
	// Setup ImGui context
	ImGui::CreateContext();
	sf::RenderWindow window(sf::VideoMode(640, 480), "Test GUI");
	ImGui::SFML::Init(window);

	sf::Clock deltaClock;

	while (window.isOpen()) {
		sf::Event event{};
		while (window.pollEvent(event)) {
			ImGui::SFML::ProcessEvent(event);

			if (event.type == sf::Event::Closed) { window.close(); }
		}

		ImGui::SFML::Update(window, deltaClock.restart());

		ImGui::Begin("Test Begin");
                ImGui::Button("Test Button");
		ImGui::End();

		window.clear();
		ImGui::SFML::Render(window);
		window.display();
	} //end while

	ImGui::SFML::Shutdown();
}

When running my application in Visual Studio using the x64-Debug configuration I immediately get the following assertion failure for IM_ASSERT(g.FrameScopeActive). This only happens when I add the lines

ImGui::Begin("Test Begin");
ImGui::Button("Test Button");
ImGui::End();

Without them I get a running black window (first image below).

I have been unable to find a solution to this problem. I am unsure if this is an issue with ImGui-SFML or ImGui itself. Any help with this would be greatly appreciated. Thank you!

Screenshots/Video