New Notice in latest Version

[mrwweb]

I haven't had a chance to dig into this, but I'm getting the following notice when editing a help doc with the block editor in the latest WP (5.3) & WP Help (1.7.0):

Notice: Trying to get property 'id' of non-object in /wp-content/plugins/wp-help/classes/plugin.php on line 107

[ocean90]

Should get fixed by #39.