I noticed that after upgrading to 1.0.1, my Apache2 proxy pass utility was broken. Reverting to 1.0.0 fixes the issue.
<Location /plex>
#RewriteCond %{X-Plex-Client-Identifier} ^(.*)$
#RewriteRule ^/$ /plex/$1
ProxyPass http://localhost:32400
ProxyPassReverse http://localhost:32400
</Location>
<Location /web>
ProxyPass http://localhost:32400/web
ProxyPassReverse http://localhost:32400/web
</Location>
Is what I have in place for Plex.
Not sure what updates were made for the upgrade to the backend.