I downloaded the ISO yesterday and im unable to install endeavour os for some reason.
Welcome to the forum! 
Maybe mirrors are not working properly?
Please try fixing mirrors with command reflector-simple before install.
What does machineid have to do with mirrors?
BTW, I face the same issue on installation.
Logs do not include any sign of this error, it is only a popup message and calamares closes, with terminal staying open and stalled during downloading packages.
Edit: my case was from a multiboot USB (manual boot from grub cmdline, actually).
Using a normally written USB installer my installation was successful, without this error.
Now, I have to learn BSPWM navigation… 
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I am having the same error and I cannot figure out why.
My USB is formatted fine. I only get this error when I try to install with KDE online. If I go offline, it will finish, but the OS will not update at all. Fails every time.
I will try once more from a fresh USB.
I had the same issue with the online installer, had to use the offline installer for it to work. Last time I had used the offline installer, on the august ISO, it gave me a broken system. I hope this issue gets patched.
Please feel free to use the latest ISO. EndeavourOS is a rolling release distribution.
I used the latest ISO. I was just mentioning my bad experience with offline install at an earlier time. I don’t really trust the offline installer because of it.
What was broken?
I can’t remember. All I know was that it was bad enough for a reinstall. My apps probably weren’t working. Anyway, that was a long time ago and I have never had issues with offline installs since. The only thing I am annoyed about is the online installer not working because of this error.
Can you return:
inxi -Fxxxza --no-host
System:
Kernel: 5.16.3-xanmod1-linux-xanmod-edge x86_64 bits: 64 compiler: gcc
v: 11.1.0 parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-xanmod-edge
root=UUID=666d0e81-dbc3-4298-b5d4-6f0dbe3a3aec rw rootflags=subvol=@
loglevel=3 nowatchdog mitigations=off amdgpu.ppfeaturemask=0xffffffff
cpufreq.default_governor=performance pcie_aspm=off pci=pcie_bus_perf
pcie_ports=native pti=off tsc=nowatchdog threadirqs io_delay=none
ecrc=off workqueue.power_efficient=0 libahci.ignore_sss=1
scsi_mod.use_blk_mq=1 cryptomgr.notests elevator=bfq noreplace-smp
rcupdate.rcu_expedited=1 psi=0 clearcpuid=514 psi=0 clearcpuid=514
Desktop: Xfce 4.16.0 tk: Gtk 3.24.29 info: xfce4-panel wm: xfwm 4.16.1
vt: 7 dm: LightDM 1.30.0 Distro: EndeavourOS base: Arch Linux
Machine:
Type: Desktop System: ASUS product: N/A v: N/A serial: <superuser required>
Mobo: ASUSTeK model: TUF GAMING X570-PRO (WI-FI) v: Rev X.0x
serial: <superuser required> UEFI: American Megatrends v: 4021
date: 08/10/2021
CPU:
Info: model: AMD Ryzen 7 2700X bits: 64 type: MT MCP arch: Zen+
family: 0x17 (23) model-id: 8 stepping: 2 microcode: 0x800820D
Topology: cpus: 1x cores: 8 tpc: 2 threads: 16 smt: enabled cache:
L1: 768 KiB desc: d-8x32 KiB; i-8x64 KiB L2: 4 MiB desc: 8x512 KiB
L3: 16 MiB desc: 2x8 MiB
Speed (MHz): avg: 3999 high: 4000 min/max: N/A cores: 1: 4000 2: 4000
3: 4000 4: 4000 5: 4000 6: 4000 7: 4000 8: 3988 9: 4000 10: 4000 11: 4000
12: 4000 13: 4000 14: 4000 15: 4000 16: 4000 bogomips: 127998
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
Vulnerabilities:
Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: spec_store_bypass status: Vulnerable
Type: spectre_v1 status: Vulnerable: __user pointer sanitization and
usercopy barriers only; no swapgs barriers
Type: spectre_v2 status: Vulnerable, IBPB: disabled, STIBP: disabled
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: AMD Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT]
vendor: Tul driver: amdgpu v: kernel bus-ID: 0a:00.0 chip-ID: 1002:731f
class-ID: 0300
Display: x11 server: X.Org 1.21.1.3 compositor: xfwm4 v: 4.16.1 driver:
loaded: amdgpu,ati unloaded: modesetting,radeon alternate: fbdev,vesa
display-ID: :0.0 screens: 1
Screen-1: 0 s-res: 3840x1080 s-dpi: 96 s-size: 1016x285mm (40.0x11.2")
s-diag: 1055mm (41.5")
Monitor-1: DisplayPort-0 res: 1920x1080 dpi: 90
size: 544x303mm (21.4x11.9") diag: 623mm (24.5")
Monitor-2: HDMI-A-0 res: 1920x1080 hz: 60 dpi: 93
size: 527x296mm (20.7x11.7") diag: 604mm (23.8")
OpenGL: renderer: AMD Radeon RX 5700 XT (NAVI10 DRM 3.44.0
5.16.3-xanmod1-linux-xanmod-edge LLVM 13.0.0)
v: 4.6 Mesa 21.3.5 direct render: Yes
Audio:
Device-1: AMD Navi 10 HDMI Audio driver: snd_hda_intel v: kernel
bus-ID: 0a:00.1 chip-ID: 1002:ab38 class-ID: 0403
Device-2: AMD Family 17h HD Audio vendor: ASUSTeK driver: snd_hda_intel
v: kernel bus-ID: 0c:00.3 chip-ID: 1022:1457 class-ID: 0403
Device-3: Samson Q2U handheld mic with XLR type: USB
driver: hid-generic,snd-usb-audio,usbhid bus-ID: 5-2:2 chip-ID: 17a0:0304
class-ID: 0300
Sound Server-1: ALSA v: k5.16.3-xanmod1-linux-xanmod-edge running: yes
Sound Server-2: sndio v: N/A running: no
Sound Server-3: PulseAudio v: 15.0 running: no
Sound Server-4: PipeWire v: 0.3.44 running: yes
Network:
Device-1: Intel Ethernet I225-V vendor: ASUSTeK driver: igc v: kernel
port: N/A bus-ID: 04:00.0 chip-ID: 8086:15f3 class-ID: 0200
IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:
Local Storage: total: 2.52 TiB used: 299.43 GiB (11.6%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Intel model: SSDPEKNW512G8
size: 476.94 GiB block-size: physical: 512 B logical: 512 B
speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter> rev: 004C
temp: 37.9 C scheme: GPT
ID-2: /dev/sda maj-min: 8:0 vendor: Micron model: 1100 MTFDDAV256TBN
size: 238.47 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
type: SSD serial: <filter> rev: A020 scheme: GPT
ID-3: /dev/sdb maj-min: 8:16 vendor: Seagate
model: ST2000LM003 HN-M201RAD size: 1.82 TiB block-size: physical: 4096 B
logical: 512 B speed: 6.0 Gb/s type: HDD rpm: 5400 serial: <filter>
rev: 0001 scheme: GPT
Partition:
ID-1: / raw-size: 476.64 GiB size: 476.64 GiB (100.00%)
used: 299.42 GiB (62.8%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
used: 576 KiB (0.2%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
ID-3: /home raw-size: 476.64 GiB size: 476.64 GiB (100.00%)
used: 299.42 GiB (62.8%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
ID-4: /var/log raw-size: 476.64 GiB size: 476.64 GiB (100.00%)
used: 299.42 GiB (62.8%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
Swap:
Alert: No swap data was found.
Sensors:
System Temperatures: cpu: 39.2 C mobo: N/A gpu: amdgpu temp: 54.0 C
mem: 50.0 C
Fan Speeds (RPM): N/A gpu: amdgpu fan: 1287
Info:
Processes: 426 Uptime: 24m wakeups: 0 Memory: 15.54 GiB
used: 2.74 GiB (17.6%) Init: systemd v: 250 tool: systemctl Compilers:
gcc: 11.1.0 clang: 13.0.0 Packages: pacman: 2417 lib: 567 flatpak: 0
Shell: Bash v: 5.1.16 running-in: xfce4-terminal inxi: 3.3.12
I’m receiving the same error. Fairly new to Linux and chose to erase and replace windows. I’ve only tried the online installation because I want to use vanilla and gnome. Is it fairly simple to install these after doing an offline installation with xfce? Here’s my log
https://termbin.com/82cl
Thanks
sound something on your disk space, on which disk you want to install ?