json.hpp not found whe running ./install_copy

[Norfaisbest]

I have installed the Goldberg emulator by cloning it manually. When I try to run ./install_copy I get this error:

+populate:4> [[ 1 != 1 ]]
+populate:8> local var_type=eval
+populate:9> local var='("${APP_ROOT}")'
+populate:10> [[ eval == file ]]
+populate:18> [[ eval == eval ]]
+populate:19> eval 'export OVERRIDE_DIRS=("${APP_ROOT}")'
+(eval):1> export OVERRIDE_DIRS=( '/home/mint/.local/share/Steam/steamapps/common/Hearts of Iron IV' )
+populate:20> vars_done[$key]=1
+populate:1> key=GOLDBERG_BUILD
+populate:2> eval 'local this_deps=()'
+(eval):1> local this_deps=( )
+populate:8> local var_type=eval
+populate:9> local var='"release"'
+populate:10> [[ eval == file ]]
+populate:18> [[ eval == eval ]]
+populate:19> eval 'export GOLDBERG_BUILD="release"'
+(eval):1> export GOLDBERG_BUILD=release
+populate:20> vars_done[$key]=1
+./common:84> echo 'Populated INSTALL_STR INSTALL APP_MARK_EXEC INSTALLS APP_MARK_EXEC_LOC OVERRIDE_DIRS APP_ROOT GOLDBERG_BUILD APP'
Populated INSTALL_STR INSTALL APP_MARK_EXEC INSTALLS APP_MARK_EXEC_LOC OVERRIDE_DIRS APP_ROOT GOLDBERG_BUILD APP
+./install:4> fail_if_not_populated APP APP_ROOT GOLDBERG_BUILD
+fail_if_not_populated:1> var=APP
+fail_if_not_populated:2> [[ 1 != 1 ]]
+fail_if_not_populated:1> var=APP_ROOT
+fail_if_not_populated:2> [[ 1 != 1 ]]
+fail_if_not_populated:1> var=GOLDBERG_BUILD
+fail_if_not_populated:2> [[ 1 != 1 ]]
+./install:6> pushd goldberg_emulator
+./install:7> make clean -j4
rm -f dll/base.o dll/dll.o dll/flat.o dll/local_storage.o dll/network.o dll/settings.o dll/settings_parser.o dll/steam_applist.o dll/steam_apps.o dll/steam_client.o dll/steam_gameserver.o dll/steam_gameserverstats.o dll/steam_http.o dll/steam_matchmaking_servers.o dll/steam_music.o dll/steam_musicremote.o dll/steam_parental.o dll/steam_screenshots.o dll/steam_video.o dll/wrap.o dll/net.pb.o libsteam_api.so dll/net.pb.cc dll/net.pb.h
+./install:8> make -j4 release
protoc -I./dll/ --cpp_out=./dll/ ./dll/*.proto
clang++ -fPIC -std=c++14 -DNDEBUG -DEMU_RELEASE_BUILD -Ofast -c -o dll/base.o dll/base.cpp
clang++ -fPIC -std=c++14 -DNDEBUG -DEMU_RELEASE_BUILD -Ofast -c -o dll/dll.o dll/dll.cpp
clang++ -fPIC -std=c++14 -DNDEBUG -DEMU_RELEASE_BUILD -Ofast -c -o dll/flat.o dll/flat.cpp
clang++ -fPIC -std=c++14 -DNDEBUG -DEMU_RELEASE_BUILD -Ofast -c -o dll/local_storage.o dll/local_storage.cpp
In file included from dll/local_storage.cpp:18:
In file included from dll/local_storage.h:21:
In file included from dll/base.h:21:
dll/common_includes.h:169:10: fatal error: '../json/json.hpp' file not found
#include "../json/json.hpp"
^~~~~~~~~~~~~~~~~~
In file included from dll/dll.cpp:19:
In file included from dll/dll.h:18:
In file included from dll/steam_client.h:18:
In file included from dll/base.h:21:
dll/common_includes.h:169:10: fatal error: '../json/json.hpp' file not found
#include "../json/json.hpp"
^~~~~~~~~~~~~~~~~~
In file included from dll/base.cpp:18:
In file included from dll/base.h:21:
dll/common_includes.h:169:10: fatal error: '../json/json.hpp' file not found
#include "../json/json.hpp"
^~~~~~~~~~~~~~~~~~
In file included from dll/flat.cpp:20:
In file included from dll/dll.h:18:
In file included from dll/steam_client.h:18:
In file included from dll/base.h:21:
dll/common_includes.h:169:10: fatal error: '../json/json.hpp' file not found
#include "../json/json.hpp"
^~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [Makefile:44: dll/base.o] Error 1
make: *** Waiting for unfinished jobs....
1 error generated.
make: *** [Makefile:44: dll/dll.o] Error 1
1 error generated.
make: *** [Makefile:44: dll/flat.o] Error 1
1 error generated.
make: *** [Makefile:44: dll/local_storage.o] Error 1
+./install:8> exit 2
+./install_copy:11> exit 2

[Norfaisbest]

I had to install the emulator using gitlab.