I'm trying to upgrade an older version
8.5 of drupal core to
I get the following message when I refresh or try to do the
update.php on my site:
Warning: Class Drupal\Core\Extension\Extension has no unserializer in Drupal\Core\Cache\DatabaseBackend->prepareItem() (line 167 of core/lib/Drupal/Core/Cache/DatabaseBackend.php).
This is with
sites/default/settings.php edited with:
$settings['update_free_access'] = TRUE;
and as this problem has raised its head before here I've added as suggested
$settings['rebuild_access'] = TRUE;
and I've then run
Still to no avail.
Does anyone have any suggestions on what to try next?
I don't have composer or command line on my site. So I can't get drush to clear the cache.
What can I try next?