The block settings is not visible, because the hook_block 's configure case is return with $output (html string), but need return the $form (php array).

Solution:
I delete the $output = drupal_get_form('forward_block', $form); line from the end of hook_block's configure case.
And modify the return $output to return $form.
Now the block settings is visible.

Comments

seanr’s picture

seanr
he/him
commented
Status: Active » Closed (won't fix)

4.7 version is no longer being maintained except for critical bugs and security issues.