Where can we see the website in question?
What other plugins and theme do you use on the site?
List of plugins:
admin-menu-editor
advanced-database-cleaner-pro
akismet
autoptimize
cf7-mailchimp
companion-auto-update
contact-form-7
cookie-law-info
cpo-companion
duplicate-post
easy-digital-downloads-pro
edd-all-access
edd-auto-register
edd-free-downloads
edd-git-download-updater
edd-invoices
edd-mail-chimp
edd-multi-currency
edd-recurring
edd-social-discounts
edd-software-licensing
edd-software-specs
edd-stripe
email-encoder-bundle
emoji-toolbar
enable-media-replace
filebird
flamingo
google-analytics-for-wordpress
health-check
highlight-search-terms
http-headers
image-comparison-block
log-http-requests
login-logout-menu
loginpress
modula-best-grid-gallery
open-search-document
really-simple-ssl
redirection
safe-svg
shortcodes-finder
site-health-tool-manager
updraftplus
webp-express
wedocs
widget-context
wordfence
wordpress-seo
wp-fastest-cache
wpfront-scroll-top
Also happens on another of my sites with these plugins:
akismet
companion-auto-update
contact-form-7
cookie-notice
disable-gutenberg
duplicate-post
email-encoder-bundle
enable-media-replace
google-analytics-for-wordpress
health-check
highslide-integration
http-headers
inline-google-spreadsheet-viewer
jquery-archive-list-widget
newsletter
newsletter-archive
newsletter-extensions
newsletter-import
newsletter-instasend
newsletter-lock
newsletter-wpusers
open-search-document
open-web-analytics
participants-database
pdb-datepicker
pdb-field-group-tabs
really-simple-ssl
the-events-calendar
theme-check
tinymce-custom-styles
updraftplus
user-role-editor
w3-total-cache
wordfence
wp-external-links
wp-polls
xnau-plugin-updates
Theme is an updated version of https://github.com/WPChill/cpothemes-theme
Try switching to the default theme, deactivating all plugins excluding Contact Form 7, Akismet, Flamingo, Health Check, Really Simple SSL and Wordfence Security, and clearing all cache data.
Why you are advised to deactivate plugins and switch to the default theme.
