Reply To: "White Screen of Death"
Finally had a moment to check this and get back to you.
So far so good.
Notes: NO upgrade to WP. We just stayed on our current version 4.4.6.
I downloaded the new version of your theme and Twenty Seventeen.
I deleted Twenty Sixteen.
(Admission: I didn’t realise that Twenty Seventeen required the new version of WP – oops!)
I replaced the version of Govintranet we were using and used the latest version. At the time of writing this is 4.34.
We could never get the searchform.php to work. So I’ve bodged a fix to force the search to return the correct permalink structure we’ve chosen.