Installed Blog and Widgets modules - templates not found

Silverstripe Version:

I have just reinstalled the blog and widgets modules while doing an upgrade of a site from SS 3.6.1 to 4.1.0
When I add a blog post I get an error due to templates not being found:

[User Warning] None of the following templates could be found: Array ( [0] => Array ( [type] => Includes [0] => EntryMeta ) [1] => EntryMeta ) in themes "Array ( [0] => $public [1] => bootstrapcasa [2] => $default ) "

My theme.yml is

    - '$public'
    - 'bootstrapcasa'
    - '$default'

I tried copying to themes/bootstrapcasa/templates/SilverStripe/Blog/Includes/ but still no joy.
I have been rebuilding and flushing the site to see whether that helps but no joy.

I have sorted this out - I had some old templates that I had moved into themes/bootstrapcasa/templates/SilverStripe/Blog/ and hadn’t changed all of the includes in those files.