Problem

After installed BulletProof Security plugin in WordPress and activated the .htaccess of root and wp-admin, the deletion of any plugin will be failed without error message.

Reason

Not really know yet. Guessing the access to plugins directory is not rewritten correctly.

Solution

1. Activate the default .htaccess files in BulletProof Security plugin

2. Delete the plugin you want

3. Re-activate the secure .htaccess files in BulletProof Security plugin