For some unknown reason my mass mailing emails and templates are not saving correctly, previously no problem but I do not khow what has changed.  On saving all appears OK but on editing I get the error

 Traceback (most recent call last):

File "/usr/lib/python2.7/dist-packages/openerp/addons/base/ir/ir_attachment.py", line 151, in _file_read r = open(full_path,'rb').read().encode('base64')IOError: [Errno 2] No such file or directory: u'/var/lib/odoo/filestore/infraredheaterpanels/21/21cdf7b6948b5e79d8ffb9977dea2dae5d1ae8fa'

The template then appears without my edits.  

The other error that then subsequently appears on trying to edit the template isO

File "/usr/lib/python2.7/dist-packages/werkzeug/wsgi.py", line 567, in __call__

cleaned_path = cleaned_path.encode(sys.getfilesystemencoding())

UnicodeEncodeError: 'ascii' codec can't encode character u'\uf001' in position 24: ordinal not in range(128)

I am running Odoo on Docker with Nginx to manage multiple instances and db's.  The development instance does not have the problem.  

Any ideas would be greatly appreciated.