413 Request entity too large
June 1, 2018

# cat /etc/httpd/conf/modsecurity.d/rules/tortix/modsec/tortix_waf.conf | grep SecRequestBodyNoFiles
SecRequestBodyNoFilesLimit 10000000
# cat /etc/httpd/conf.d/mod_security.conf | grep SecRequestBodyNoFilesLimit
SecRequestBodyNoFilesLimit 10000000

https://support.plesk.com/hc/en-us/articles/115001764933-Unable-to-edit-document-on-the-website-ModSecurity-Request-body-no-files-data-length-is-larger-than-the-configured-limit-