During update from rocketlauncher gantry 5 version to version 5.2.3 and other updates something went wrong.
Site complete down with message:
"Uncaught exception: The merge filter only works with arrays or "Traversable", got "NULL" as first argument in "partials/page_head.html.twig" at line 1."
Install new clean Rocketlauncher to see what happened.
Installation perfect. Site is as it should be. No other changes made.
Two plugins need upgrade:
Gantry 5.? to 5.2.3
Timber.
Start with update Gantry.
Then site is down with the same message - nothing loads at all:
"Uncaught exception: The merge filter only works with arrays or "Traversable", got "NULL" as first argument in "partials/page_head.html.twig" at line 1."
The first version from the rocketlauncher has been running with no problems on the same testsite and local via xampp.
I hope someone know a solution, at least to get started with a new site with the updated Gantry version.