Can't access mount after initial backup with rclone

I just installed rclone (v1.56.0) and kopia (0.8.4) on Ubuntu 20.04.2. I made a backup of the whole system (excluding /swap.img /dev /proc /sys /tmp /run /media /lost+found) to Mega through rclone, and when mounting the snapshot I can’t access any files in it, not even list it. I’ve run all commands as root. I made a second snapshot a few hours later.

Output from kopia snapshot list

  2021-09-19 13:54:05 CEST k134165f69e790a95966edd03150459f4 19.7 GB drwxr-xr-x files:321389 dirs:43165 (latest-2,hourly-2)
  2021-09-19 19:06:59 CEST kb57c62594eb7e7b15ef8ba941eb681b5 19.8 GB drwxr-xr-x files:321437 dirs:43167 (latest-1,annual-1,monthly-1,weekly-1,daily-1,hourly-1)

Output from running: kopia mount --log-level=debug all /mnt/tmp

build version v0.8.4, available v
no updated version available
password for /root/.config/kopia/repository.config retrieved from password file
generating new TLS certificate
adding alternative IP to certificate: 127.0.0.1
starting /usr/bin/rclone
detected webdav address: https://127.0.0.1:33971/
combined 7 into 5 index segments
Mounted 'all' on /mnt/tmp
Press Ctrl-C to unmount.
listing manifest contents
finished sweeping content cache in 66.049µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 222.538µs and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 491.292µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 1.36053ms and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 59.405µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 247.907µs and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 833.22µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 1.886309ms and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 64.037µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 210.967µs and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 84.117µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 375.46µs and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 92.615µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 500.468µs and retained 68668526/5242880000 bytes (1 %)
finished sweeping content cache in 79.227µs and retained 0/5242880000 bytes (0 %)
finished sweeping metadata cache in 420.167µs and retained 68668526/5242880000 bytes (1 %)

When I run ls in the mounted snapshot it just returns: ls: reading directory '.': Input/output error

Output from df -aTh | grep kopia

kopia fuse.kopia 0.0K 0.0K 0.0K - /mnt/tmp

Edit
It seems like it works if I mount a specific snapshot, by using kopia mount k134165f69e790a95966edd03150459f4 /mnt/tmp for example.

What could be the problem?

It’s the same as Input/output error mounting 'all' · Issue #1208 · kopia/kopia · GitHub

I’m unable to reproduce this using latest builds (0.9.0-rc1), can you try using that?

I’ve tried now, after updating to 0.9.0-rc1, and it’s the same thing.