file.managed doesn't copy files in 18.04

[Bryce Larson]

When using the available packages for salt-master in the ubuntu repos, I get this error on the minions. It doesn't download the file, it just fails. This is the output.

[WARNING ] Data transport is broken, got: b'', type: bytes, exception: byte indices must be integers or slices, not str, attempt 1 of 3
[WARNING ] Data transport is broken, got: b'', type: bytes, exception: byte indices must be integers or slices, not str, attempt 2 of 3
[WARNING ] Data transport is broken, got: b'', type: bytes, exception: byte indices must be integers or slices, not str, attempt 3 of 3
[WARNING ] Data transport is broken, got: b'', type: bytes, exception: byte indices must be integers or slices, not str, attempt 4 of 3
[ERROR ] Data transport is broken, got: b'', type: bytes, exception: byte indices must be integers or slices, not str, retry attempts exhausted
[ERROR ] Unable to cache file 'salt://vmware/VMware-Workstation-Full-14.1.1-7528167.x86_64.bundle' from saltenv 'prod'.
[ERROR ] Source file 'salt://vmware/VMware-Workstation-Full-14.1.1-7528167.x86_64.bundle' not found

----------
          ID: /root/VMware-Workstation-Full-14.1.1-7528167.x86_64.bundle
    Function: file.managed
      Result: False
     Comment: Source file 'salt://vmware/VMware-Workstation-Full-14.1.1-7528167.x86_64.bundle' not found
     Started: 10:26:29.076656
    Duration: 4677.208 ms
     Changes:

This is the relevant state:

/root/VMware-Workstation-Full-14.1.1-7528167.x86_64.bundle:
  file.managed:
    - source:
      - salt://vmware/VMware-Workstation-Full-14.1.1-7528167.x86_64.bundle
    - user: root
    - group: root
    - mode: '775'

This works fine when using version 2018.3.0 installing from the bootstrap.saltstack.com repo.

Metadata

Description: Ubuntu 18.04 LTS
Release: 18.04

salt-master:
  Installed: 2017.7.4+dfsg1-1