I can not edit the subpage after enabling the add-on

Hello,
After enabling the add-on, I can not edit one of my subpages. A white background appears and I can do nothing. After disabling, I can edit normally.

subpage: https://lowcypieniedzy.pl/buxy-wyplaty/
(maybe some other ones do not work either)

# SITE_URL:               https://lowcypieniedzy.pl
# HOME_URL:               https://lowcypieniedzy.pl
# IS MULTISITE :          No

# THEME | VERSION :       Hueman | v3.4.3
# WP VERSION :            4.9.8
# PERMALINK STRUCTURE :   /%year%/%monthnum%/%day%/%postname%/
# 13 ACTIVE PLUGINS :
                          - Contact Form by Supsystic (version 1.5.5)
                          - Enhanced Media Library (version 2.7.2)
                          - Hueman Addons (version 2.1.0)
                          - Jetpack by WordPress.com (version 6.6.1)
                          - OneSignal Push Notifications (version 1.16.9)
                          - Report Content (version 1.5.0)
                          - Shortcodes Ultimate (version 5.0.7)
                          - TinyMCE Advanced (version 4.8.0)
                          - Wordfence Security (version 7.1.15)
                          - WP-SpamShield (version 1.9.21)
                          - WP Super Cache (version 1.6.4)
                          - WPtouch Mobile Plugin (version 4.3.28)
                          - Yoast SEO (version 8.4)

# PHP Version:            5.6.38
# MySQL Version:          5.5.5-10.0.32-MariaDB-0+deb8u1
# Web Server Info:        Apache

# WordPress Memory Limit: 256MB
# PHP Memory Limit:       128M
# PHP Upload Max Size:    100M
# PHP Post Max Size:      100M
# PHP Upload Max Filesize:100M
# PHP Time Limit:         10
# PHP Max Input Vars:     5000
# PHP Arg Separator:      &
# PHP Allow URL File Open:Yes
# WP_DEBUG:               Disabled

# Show On Front:          page
# Page On Front:          (#0)
# Page For Posts:         (#0)