systemctl enable x => no such file or directory

[bassie127]

I try to enable a service via
$ sudo systemctl enable tracks.service
this gives "Failed to execute operation: No such file or directory"

$ strace sudo systemctl enable tracks.service
gives following info; what's wrong here?

pipe2([3, 4], 0) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x76f45068) = 476
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=476, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
ppoll([{fd=3, events=POLLHUP}], 1, NULL, NULL, 8) = 1 ([{fd=3, revents=POLLHUP}])
close(3) = 0
geteuid32() = 0
open("/sys/fs/kdbus/0-system/bus", O_RDWR|O_NOCTTY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
getsockopt(3, SOL_SOCKET, SO_RCVBUF, [163840], [4]) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUFFORCE, [8388608], 4) = 0
getsockopt(3, SOL_SOCKET, SO_SNDBUF, [163840], [4]) = 0
setsockopt(3, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = 0
connect(3, {sa_family=AF_LOCAL, sun_path="/run/systemd/private"}, 22) = 0
getsockopt(3, SOL_SOCKET, SO_PEERCRED, {pid=1, uid=0, gid=0}, [12]) = 0
fstat64(3, {st_mode=S_IFSOCK|0777, st_size=0, ...}) = 0
getsockopt(3, SOL_SOCKET, SO_ACCEPTCONN, [0], [4]) = 0
getsockname(3, {sa_family=AF_LOCAL, NULL}, [2]) = 0
geteuid32() = 0
sendmsg(3, {msg_name(0)=NULL, msg_iov(3)=[{"\0AUTH EXTERNAL ", 15}, {"30", 2}, {"\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n", 28}], msg_controllen=0, msg_flags=0}, MSG_DONTWAIT|MSG_NOSIGNAL) = 45
getsockopt(3, SOL_SOCKET, SO_PEERCRED, {pid=1, uid=0, gid=0}, [12]) = 0
recvmsg(3, 0x7e980854, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable)
ppoll([{fd=3, events=POLLIN}], 1, {24, 997887000}, NULL, 8) = 1 ([{fd=3, revents=POLLIN}], left {24, 978552891})
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"OK e344e67a4d8e4ef7b7935211049c0"..., 256}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 52
sendmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\4\1$\0\0\0\1\0\0\0\242\0\0\0\1\1o\0\31\0\0\0/org/fre"..., 184}, {"\30\0\0\0\23\0\0\0tracks2.3.0.service\0\0\0\0\0"..., 36}], msg_controllen=0, msg_flags=0}, MSG_DONTWAIT|MSG_NOSIGNAL) = 220
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"l\3\1\1\36\0\0\0\1\0\0\0?\0\0\0\5\1u\0\1\0\0\0", 24}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 24
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"\4\1s\0'\0\0\0org.freedesktop.DBus.Err"..., 86}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 86
writev(2, [{"Failed to execute operation: No "..., 54}, {"\n", 1}], 2Failed to execute operation: No such file or directory

[WarheadsSE]

Does the service file exist? Is this happening for _any_ valid service?