Консольный plantuml не создаёт диаграммы из json.

@startjson
{
   "fruit":"Apple",
   "size":"Large",
   "color":"Red"
}
@endjson

~/Downloads/UML$ plantuml -tsvg -progress example.json
[##############################] 1/1

~/Downloads/UML$ plantuml -tsvg -progress -duration example.json
Duration = 0.276 seconds    

~/Downloads/UML$ strace plantuml -tpng -progress -duration example.json
execve("/usr/bin/plantuml", ["plantuml", "-tpng", "-progress", "-duration", "example.json"], 0x7ffe9f33dff0 /* 47 vars */) = 0
brk(NULL)                               = 0x562bc465c000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=198182, ...}) = 0
mmap(NULL, 198182, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fcdfe8be000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\35\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2030928, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcdfe8bc000
mmap(NULL, 4131552, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfe2d5000
mprotect(0x7fcdfe4bc000, 2097152, PROT_NONE) = 0
mmap(0x7fcdfe6bc000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7fcdfe6bc000
mmap(0x7fcdfe6c2000, 15072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdfe6c2000
close(3)                                = 0
arch_prctl(ARCH_SET_FS, 0x7fcdfe8bd540) = 0
mprotect(0x7fcdfe6bc000, 16384, PROT_READ) = 0
mprotect(0x562bc2e0c000, 8192, PROT_READ) = 0
mprotect(0x7fcdfe8ef000, 4096, PROT_READ) = 0
munmap(0x7fcdfe8be000, 198182)          = 0
getuid()                                = 1001
getgid()                                = 1001
getpid()                                = 9540
rt_sigaction(SIGCHLD, {sa_handler=0x562bc2c03200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fcdfe314040}, NULL, 8) = 0
geteuid()                               = 1001
brk(NULL)                               = 0x562bc465c000
brk(0x562bc467d000)                     = 0x562bc467d000
getppid()                               = 9538
stat("/mnt/DATA1TB/Downloads/UML", {st_mode=S_IFDIR|0775, st_size=48, ...}) = 0
stat(".", {st_mode=S_IFDIR|0775, st_size=48, ...}) = 0
openat(AT_FDCWD, "/usr/bin/plantuml", O_RDONLY) = 3
fcntl(3, F_DUPFD, 10)                   = 10
close(3)                                = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
geteuid()                               = 1001
getegid()                               = 1001
rt_sigaction(SIGINT, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x562bc2c03200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fcdfe314040}, NULL, 8) = 0
rt_sigaction(SIGQUIT, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fcdfe314040}, NULL, 8) = 0
rt_sigaction(SIGTERM, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTERM, {sa_handler=SIG_DFL, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER, sa_restorer=0x7fcdfe314040}, NULL, 8) = 0
read(10, "#!/bin/sh\n# PlantUML Launcher\n#\n"..., 8192) = 1051
geteuid()                               = 1001
faccessat(AT_FDCWD, "/usr/bin/java", X_OK) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fcdfe8bd810) = 9541
wait4(-1, Duration = 0.262 seconds            
[{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 9541
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9541, si_uid=1001, si_status=0, si_utime=71, si_stime=7} ---
rt_sigreturn({mask=[]})                 = 9541
read(10, "", 8192)                      = 0
exit_group(0)                           = ?
+++ exited with 0 +++