Display value of custom field not working

The Types plugin is making this about 10x harder than it needs to be, you’ll have to look through their documentation on the issue, but from what I can tell they don’t store items in the postmeta table in a straightforward way. I created a simple field with the plugin in a sandbox env and the meta_key for a field I named data was wpcf-data. You may want to take your post ID and do this in your DB:

SELECT * FROM wp_postmeta WHERE post_id = NNNN;

where NNNN is your post ID. You may see a wpcf-authorinfo key, that is likely then the key you should be passing to get_post_meta:

echo get_post_meta(get_the_ID(), 'wpcf-authorinfo', TRUE);