YSlow Score Drops from 96% to 77%

Any ideas of how I can prevent these problems that seem to be caused by Super Socializer? (I deactivated and then reactivated plugins one-at-a-time, and Super Socializer was the only plugin that cause the problems identified by YSlow.)

My site’s PageSpeed score also went down, although not as dramatically (98% to 91%).

=================
BEFORE Activating Super Socializer Plugin
YSlow Score = A (96%)
=================
Add Expires headers
B (89)

Make fewer HTTP requests
A (100)

Reduce DNS lookups
A (90)

Avoid URL redirects
C (70)

=================
AFTER Activating Super Socializer Plugin
YSlow Score = C (77%)
=================
Add Expires headers
F (12)

Make fewer HTTP requests
E (56)

Reduce DNS lookups
F (25)

Avoid URL redirects
D (60)

In case it helps, I posted details about my site below.

Thanks!

Mark
—–
Operating System: Linux
Server: Apache
Memory usage: 15.84 MByte
MYSQL Version: 5.6.40-84.0-log
SQL Mode: NO_ENGINE_SUBSTITUTION
PHP Version: 7.0.32
PHP Allow URL fopen: On
PHP Memory Limit: 768M
PHP Max Upload Size: 128M
PHP Max Post Size: 128M
PHP Max Script Execute Time: 120
PHP Exif support: Yes ( V7.0.)
PHP IPTC support: Yes
PHP XML support: Yes
Site URL: https://ptsdexams.com
Home URL: https://ptsdexams.com
WordPress Version: 4.9.8
WordPress DB Version: 38590
Multisite: No
Active Theme: eleven40 Pro Theme 2.2.1
Site Title: PTSDexams.com
Site Language: en-US
Front Page Displays: posts
Search Engine Visibility: 1
Permalink Setting: /%postname%/

———-
Active Plugins
———-
Accelerated Mobile Pages: 0.9.97.19
All In One SEO Pack Pro: 2.9
Anti-spam Pro: 4.2
Boxzilla: 3.2.7
Boxzilla – Exit Intent: 1.0
Boxzilla – Google Analytics: 1.1.5
Boxzilla – Statistics: 1.0.4
Boxzilla – Theme Pack: 1.1.4
CDN Enabler: 1.0.8
Disable Emojis (GDPR friendly): 1.7.2
EWWW Image Optimizer Cloud: 4.4.1
Genesis Design Palette Pro: 1.5.1
Genesis Design Palette Pro – Entry Content: 1.0.4
Genesis Simple Edits: 2.2.1
Google Analytics Dashboard for WP (GADWP): 5.3.5
JCH Optimize Pro: 2.2.2
Minimal Blogging Theme for AMP: 1.0
Redirection: 3.5
SBI! for WP: 1.7.6
SG Optimizer: 4.0.7
Shortcoder: 4.1.7
Social Media Follow Buttons Bar: 4.42
SSL Insecure Content Fixer: 2.7.0
TablePress: 1.9.1
TinyMCE Advanced: 4.8.0
Wordfence Security: 7.1.15
WP AutoTerms: 2.2.0

The page I need help with: [log in to see the link]