🇲🇾Malaysia @hunchang

I had the same issue, when we run drush cim.

Added what wheelercreek suggest but the other config file is complaining pass through json_decode was an array (just like what wheelercreek experience).

created a patch to fix the issue, basically added checking if it is array

if (!is_array($block_classes_stored)) {
        $block_classes_stored = json_decode($block_classes_stored, true);
    }