I try to execute snapcraft command on my snapcraft.yaml file, but got this error:

Pulling my_package
Failed to pull source: 'my_package.orig_aarch64.tar.gz' not found.
Recommended resolution: Make sure the source path is correct and accessible.

Tried to access by absolute path, but still fails:

Pulling my_package
Failed to pull source: '/home/kbuilder/snap/my_package.orig_aarch64.tar.gz' not found.
Recommended resolution: Make sure the source path is correct and accessible.

However, the ls command shows the tarball is in the directory:

+++ ls -al /home/kbuilder/snap
total 720232
drwx------ 5 kbuilder kbuilder      4096 Mar 14 03:58 .
drwxr-x--- 7 kbuilder kbuilder      4096 Mar 14 03:57 ..
-rw-r--r-- 1 kbuilder kbuilder  63537239 Mar 14 03:58 my_package.orig_aarch64.tar.gz
drwxr-xr-x 4 kbuilder kbuilder      4096 Mar 14 03:58 lxd
drwxr-xr-x 4 kbuilder kbuilder      4096 Mar 14 03:58 multipass
drwxr-xr-x 4 kbuilder kbuilder      4096 Mar 14 03:57 snapcraft
-rw-rw-r-- 1 kbuilder kbuilder      3542 Mar 14 03:58 snapcraft.yaml

My snapcraft.yaml looks like this:

name: my_package
version: VERSION
summary: my package
description: my package services
grade: stable
confinement: classic
base: core22

environment:
  PATH: $SNAP/usr/bin/:$PATH


architectures:
  - build-on: amd64
  - build-on: arm64

parts:
  my-package:
    plugin: dump
    source:
      - on amd64: /home/kbuilder/snap/my_package.orig_amd64.tar.gz
      - on arm64: /home/kbuilder/snap/my_package.orig_aarch64.tar.gz
    source-type: local

    stage-packages:
      - on amd64:
        - libncursesw5
        - libtinfo5
        - libdb5.3
        - libbz2-1.0
        - zlib1g
        - libgcc1
        - libstdc++6
        - liblzma5
        - libc6

Anyone know how to solve this? Thanks!