I've just created a new Odoo database. In the sales app, I created a new quotation for a client (who has an email associated). I try clicking the button "Send by email", but I get the following error. What am I doing wrong or how can I resolve this?

Error:
Odoo Server Error

Traceback (most recent call last):
  File "/home/odoo/src/odoo/14.0/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
    result = request.dispatch()
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 683, in dispatch
    result = self._call_function(**self.params)
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 359, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/home/odoo/src/odoo/14.0/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 347, in checked_call
    result = self.endpoint(*a, **kw)
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 912, in __call__
    return self.method(*args, **kw)
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 531, in response_wrap
    response = f(*args, **kw)
  File "/home/odoo/src/odoo/14.0/addons/web/controllers/main.py", line 1389, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/home/odoo/src/odoo/14.0/addons/web/controllers/main.py", line 1381, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/home/odoo/src/odoo/14.0/odoo/api.py", line 396, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/home/odoo/src/odoo/14.0/odoo/api.py", line 383, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/home/odoo/src/odoo/14.0/odoo/models.py", line 6230, in onchange
    record._onchange_eval(name, field_onchange[name], result)
  File "/home/odoo/src/odoo/14.0/odoo/models.py", line 5986, in _onchange_eval
    method_res = method(self)
  File "/home/odoo/src/odoo/14.0/addons/mail/wizard/mail_compose_message.py", line 360, in onchange_template_id_wrapper
    values = self.onchange_template_id(self.template_id.id, self.composition_mode, self.model, self.res_id)['value']
  File "/home/odoo/src/odoo/14.0/addons/mail/wizard/mail_compose_message.py", line 378, in onchange_template_id
    values = self.generate_email_for_composer(
  File "/home/odoo/src/odoo/14.0/addons/mail/wizard/mail_compose_message.py", line 512, in generate_email_for_composer
    template_values = self.env['mail.template'].with_context(tpl_partners_only=True).browse(template_id).generate_email(res_ids, fields)
  File "/home/odoo/src/odoo/14.0/addons/account_edi/models/mail_template.py", line 10, in generate_email
    res = super().generate_email(res_ids, fields)
  File "/home/odoo/src/odoo/14.0/addons/mail/models/mail_template.py", line 199, in generate_email
    result, format = report._render_qweb_pdf([res_id])
  File "/home/odoo/src/odoo/14.0/odoo/addons/base/models/ir_actions_report.py", line 815, in _render_qweb_pdf
    pdf_content = self._run_wkhtmltopdf(
  File "/home/odoo/src/odoo/14.0/odoo/addons/base/models/ir_actions_report.py", line 438, in _run_wkhtmltopdf
    head_file_fd, head_file_path = tempfile.mkstemp(suffix='.html', prefix='report.header.tmp.')
  File "/usr/lib/python3.8/tempfile.py", line 471, in mkstemp
    return _mkstemp_inner(dir, prefix, suffix, flags, output_type)
  File "/usr/lib/python3.8/tempfile.py", line 389, in _mkstemp_inner
    fd = _os.open(file, flags, 0o600)
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 639, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/odoo/src/odoo/14.0/odoo/http.py", line 315, in _handle_exception
    raise exception.with_traceback(None) from new_cause
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/report.header.tmp.wixa4uaa.html'