What is error code Code=2501, Status=422?

I have just installed rclone on my Linux machine and have

  1. mounted a local drive to proton drive

  2. run a sync command - once

What is the problem you are having with rclone?

getting an intermittent error

Run the command 'rclone version' and share the full output of the command.

rclone v1.72.1
- os/version: debian bookworm/sid (64 bit)
- os/kernel: 6.16.3-76061603-generic (x86_64)
- os/type: linux
- os/arch: amd64
- go/version: go1.25.5
- go/linking: static
- go/tags: none

Which cloud storage system are you using? (eg Google Drive)

proton drive

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone mount protondrive:/home/kameroncole/protondrive /media/kameroncole/extradrive1/protondrive --vfs-cache-mode full&

Please run 'rclone config redacted' and share the full output. If you get command not found, please make sure to update rclone.

[protondrive]
type = protondrive
username = kamcole@protonmail.com
password = XXX
client_uid = XXX
client_access_token = XXX
client_refresh_token = XXX
client_salted_key_pass = XXX
### Double check the config for sensitive info before posting publicly

A log from the command that you were trying to run with the -vv flag

2026/01/02 09:45:50.227456 ERROR RESTY 422 GET https://mail.proton.me/api/drive/shares/yJtmSWzaD0ebJZZmPbkzisOhrelpvxArTk96HKXKWXhU3iOMvapXMaVJysM4mYMRrq6R3SSkePgA4ekEuSJoFg==/files/B2cw6Lx_jE1RuFEnKhsfHxxHP-OBCl6xc4bF0ctiIilg17VJkVT-1OMXVkW0Ke5_YtrABG9WNe2SCqvGCcMbfw==/revisions: File or folder not found (Code=2501, Status=422)
2026/01/02 09:45:50 ERROR : testfile.txt: Failed to copy: 422 GET https://mail.proton.me/api/drive/shares/yJtmSWzaD0ebJZZmPbkzisOhrelpvxArTk96HKXKWXhU3iOMvapXMaVJysM4mYMRrq6R3SSkePgA4ekEuSJoFg==/files/B2cw6Lx_jE1RuFEnKhsfHxxHP-OBCl6xc4bF0ctiIilg17VJkVT-1OMXVkW0Ke5_YtrABG9WNe2SCqvGCcMbfw==/revisions: File or folder not found (Code=2501, Status=422)
2026/01/02 09:45:50 ERROR : testfile.txt: vfs cache: failed to upload try #8, will retry in 5m0s: vfs cache: failed to transfer file from cache to remote: 422 GET https://mail.proton.me/api/drive/shares/yJtmSWzaD0ebJZZmPbkzisOhrelpvxArTk96HKXKWXhU3iOMvapXMaVJysM4mYMRrq6R3SSkePgA4ekEuSJoFg==/files/B2cw6Lx_jE1RuFEnKhsfHxxHP-OBCl6xc4bF0ctiIilg17VJkVT-1OMXVkW0Ke5_YtrABG9WNe2SCqvGCcMbfw==/revisions: File or folder not found (Code=2501, Status=422)
2026/01/02 09:47:20.038110 WARN RESTY 422 POST https://fra-storage.proton.me/storage/blocks: Operation failed: Please retry (Code=200501, Status=422), Attempt 1
2026/01/02 09:47:20.038146 ERROR RESTY 422 POST https://fra-storage.proton.me/storage/blocks: Operation failed: Please retry (Code=200501, Status=422)
2026/01/02 09:47:20 ERROR : 2026Budget.xlsx: Failed to copy: 422 POST https://fra-storage.proton.me/storage/blocks: Operation failed: Please retry (Code=200501, Status=422)