Can't get debug kit toolbar loaded

It used to work and then I upgraded to 3.6 from 3.4?. This was awhile back. I worked around it but now I need it.

I have google my brains out and followed all instructions.
OS: Fedora 26?
Sqlite3 is installed and enabled
I added a debug_kit definition to the Datasources section of app.php
Plugin::loaded(‘DebugKit’) returns true
Application.php has Configure::write(‘DebugKit.forceEnable’, true); and $this->addPlugin(‘DebugKit’, [‘bootstrap’ => true]); (also in bootstrap.php)
I ran bin/cake plugin assets symlink
I ran bin/cake plugin load DebugKit
extension=sqlite3 uncommented in php.ini and all services restarted
debug is true in app.php
debug() works
There is a symlinked debug_kit in webroot pointing to vendor/cakephp/debug_kit/webroot
No errors show up in error.log related to DebugKit

What else can I try? I’m sure a fresh install will “fix” it but I’d rather fix my current installation.