This is related to Invoking hook_custom_tokens and hook_custom_tokenValues in Joomla which used to work. It has now appeared to have stopped working which means that the custom tokens handled by civicrmHooks.php are no longer available. It looks as though civicrmHooks.php is no longer being invoked, as deliberately introducing an error does not result in CiviCRM crashing.
What has changed recently. How can we solve this?