can't install SIBR_view Ubuntu 20.04

[Walluttt]

I am currently trying to install SIBR_view on Ubuntu 20.04. I have tried to use the command git checkout fossa_compatibility as explained in the readme but it gives me:

error: pathspec 'fossa_compatibility' did not match any file(s) known to git

If i try to bypass it and run this line cmake -Bbuild . -DCMAKE_BUILD_TYPE=Release i get this output:

CMake Warning at CMakeLists.txt:21 (message):
Untested version of cmake. If you checked everything is working properly,
please update 3.18.4 in the main CmakeLists.txt with the version you
tested.

-- Git found: /usr/bin/git
-- SIBR version :
BRANCH develop
COMMIT_HASH a89f31c
TAG
VERSION 0.9.6-1-ga89f31c
-- Install path set to /home/user/cmd_code/gaussian-splatting/SIBR_viewers/install.
Note you can provide default program options for Visual Studio target properties by either setting a value for the cmake cached variable 'SIBR_PROGRAMARGS' or by setting a new environment variable 'SIBR_PROGRAMARGS'

****************** Handling core dependencies ******************
There is no provided GLEW library for your version of MSVC
-- FindGLEW: did not find GLEW CMake config file. Searching for libraries.
-- FindGLEW: GLEW_USE_STATIC_LIBS is undefined. Treated as FALSE.
-- FindGLEW: GLEW_INCLUDE_DIR: /usr/include
-- FindGLEW: GLEW_INCLUDE_DIRS: /usr/include
-- FindGLEW: CMAKE_FIND_LIBRARY_SUFFIXES for SHARED: .so;.a
-- FindGLEW: CMAKE_FIND_LIBRARY_SUFFIXES for STATIC: .so
-- FindGLEW: GLEW_SHARED_LIBRARY_RELEASE: /usr/lib/x86_64-linux-gnu/libGLEW.so
-- FindGLEW: GLEW_STATIC_LIBRARY_RELEASE: GLEW_STATIC_LIBRARY_RELEASE-NOTFOUND
-- FindGLEW: GLEW_SHARED_LIBRARY_DEBUG: GLEW_SHARED_LIBRARY_DEBUG-NOTFOUND
-- FindGLEW: GLEW_STATIC_LIBRARY_DEBUG: GLEW_STATIC_LIBRARY_DEBUG-NOTFOUND
-- FindGLEW: GLEW_SHARED_LIBRARY: /usr/lib/x86_64-linux-gnu/libGLEW.so
-- FindGLEW: GLEW_STATIC_LIBRARY: GLEW_STATIC_LIBRARY-NOTFOUND
-- FindGLEW: GLEW_LIBRARIES: /usr/lib/x86_64-linux-gnu/libGLEW.so
-- FindGLEW: GLEW_VERSION_MAJOR: 2
-- FindGLEW: GLEW_VERSION_MINOR: 1
-- FindGLEW: GLEW_VERSION_MICRO: 0
-- FindGLEW: GLEW_VERSION: 2.1.0
-- FindGLEW: Creating GLEW::glew imported target.
-- FindGLEW: Creating GLEW::GLEW imported target.
There is no provided ASSIMP library for your version of MSVC
ASSIMP_DYNAMIC_LIB is missing... at /usr/lib/x86_64-linux-gnu
There is no provided OpenCV library for your version of MSVC
-- Library imgui already available, skipping.
-- Library mrf already available, skipping.
-- Library nanoflann already available, skipping.
-- Library picojson already available, skipping.
-- Library rapidxml already available, skipping.
-- Library xatlas already available, skipping.
CMake Deprecation Warning at extlibs/xatlas/xatlas/CMakeLists.txt:4 (cmake_minimum_required):
Compatibility with CMake < 3.5 will be removed from a future version of
CMake.

Update the VERSION argument value or use a ... suffix to tell
CMake that the project does not need compatibility with older versions.

-- ****************************************************************

-- Adding dataset_tools project
-- BUILD_IBR_DATASET_TOOLS is ON
-- Adding ulr project
-- BUILD_IBR_ULR is ON
-- Generating /home/user/cmd_code/gaussian-splatting/SIBR_viewers/docs/doxyfile.in...
-- Output in /home/user/cmd_code/gaussian-splatting/SIBR_viewers/build/docs/doxyfile...
-- Generating /home/user/cmd_code/gaussian-splatting/SIBR_viewers/docs/doxygen_prebuild.cmake.in...
-- Output in /home/user/cmd_code/gaussian-splatting/SIBR_viewers/build/docs/doxygen_prebuild.cmake...
-- Generating /home/user/cmd_code/gaussian-splatting/SIBR_viewers/docs/layout.xml.in...
-- Output in /home/user/cmd_code/gaussian-splatting/SIBR_viewers/build/docs/layout.xml...
-- Configuring done (2.0s)
-- Generating done (1.1s)
-- Build files have been written to: /home/user/cmd_code/gaussian-splatting/SIBR_viewers/build

when using then cmake --build build -j24 --target install. It seems that dllexport does not work properly and cause issues with the imgui libs