1) cmake command should be ('v' added):
COMMAND ${CMAKE_COMMAND} -E tar "cvf" "${output_file}" --format=zip -- ${input_files}
2) on start

Thats odd.. the 'v' option just increases the verbosity? Why was it working before?
Actually just got similar message on MacOS.
Without 'v' letter, the archives are empty.
My archives are full. Are you sure you have the submodule loaded? I guess if it works with the 'v' option they are!
You might need to re-build the makefile also.
If you ignore the error and just open a database does it work?
Yep, but only 3 themes are available


I've deleted this files and then start app OK
cmake has created empty simple-black.mmextheme file again.
Error in CMake
file(GLOB THEME_SIMPLEBLACK_FILES "${PROJECT_SOURCE_DIR}themes/system-themes/simple-black/*")
should be
file(GLOB THEME_SIMPLEBLACK_FILES "${PROJECT_SOURCE_DIR}/themes/system-themes/simple-black/*")
My error! - Missing "/"