I see an issue already in the list with line 34 however this is a different error and it seems that the module has been updated since then as the existing line 34 is now quite different to the one listed previous. It does seem to be working but it throws up this error when creating encrypted content.
Error below:
Notice: Undefined index: safe_value in _encrypted_text_node_field_encrypt_decrypt() (line 34 of /var/www/vhosts/XXXXX.com/httpdocs/sites/all/modules/encrypted_text/encrypted_text.module).

Also the module only seems to work when admin creates content. I have created a content type and checked the "Encrypt this fields value" check box.
When Admin makes content of that type it is encrypted in the database but when an authenticated user creates the content it isn't.
When I as admin try to view the content in the browser it appears encrypted but when I look in the database all my entries are encrypted but the users arn't.
Any clues as I am really wanting to use this on a production site?
Thanks.