Emails don't send automatically: "ModuleNotFoundError: No module named 'print_designer'"

[cr4ckDe]

Information about bug

The emails in the que don't send automatically because the module print_designer is missing. Print designer works in the frontend and I can send the emails when I click the send now button.

Module

other

Version

ERPNext Version: 16.16.0

Installation method

docker

Relevant log output / Stack trace / Full Error Message.

Traceback (most recent call last):
  File "apps/frappe/frappe/email/doctype/email_queue/email_queue.py", line 225, in send
    message = ctx.build_message(recipient.recipient)
  File "apps/frappe/frappe/email/doctype/email_queue/email_queue.py", line 383, in build_message
    message = self.include_attachments(message)
  File "apps/frappe/frappe/email/doctype/email_queue/email_queue.py", line 460, in include_attachments
    print_format_file = frappe.attach_print(**attachment)
  File "apps/frappe/frappe/utils/print_utils.py", line 148, in attach_print
    print_format_doc = frappe.get_cached_doc("Print Format", print_format)
  File "apps/frappe/frappe/model/document.py", line 2175, in get_cached_doc
    doc = get_doc(*args, **kwargs)
  File "apps/frappe/frappe/model/utils/__init__.py", line 225, in wrapper
    return dispatch(args[0])(*args, **kw)
           ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "apps/frappe/frappe/model/document.py", line 124, in get_doc_str
    if controller := get_controller(doctype):
                     ~~~~~~~~~~~~~~^^^^^^^^^
  File "apps/frappe/frappe/model/base_document.py", line 92, in get_controller
    site_controllers[doctype] = import_controller(doctype)
                                ~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "apps/frappe/frappe/model/base_document.py", line 119, in import_controller
    custom_module = frappe.get_module(module_path)
  File "apps/frappe/frappe/__init__.py", line 819, in get_module
    return importlib.import_module(modulename)
           ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
  File "/usr/local/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1314, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1314, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1314, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1335, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'print_designer'

[DipenFrappe]

Please share the end-to-end steps to replicate the issue.

[cr4ckDe]

1. Install print_designer with:

docker compose exec backend bench get-app --resolve-deps print_designer
docker compose exec backend bench --site SITENAME install-app print_designer
docker compose exec backend bench --site SITENAME migrate
docker compose restart

2. Create a quote template with print designer
3. Create a quote
4. Send the quote via email and select the print designer template
5. Inspect logs