Was dealing with Elementor 403 issues and found out Apache Mod security was blocking things reading the logs. See logs below:
2023-09-12 06:01:35 Error xxxx:xxxx:1001:f8dc:ec06:c64e:c4c5:9f49 [client xxxx:xxxx:1001:f8dc:ec06:c64e:c4c5:9f49] ModSecurity: Access denied with code 403 (phase 4). Pattern match "(?:\\\\b(?:call_user_func|f(?:get(?:c|s{0,1}s)|open|read|scanf|tp_(?:nb_){0,1}f{0,1}(?:ge|pu)t|write)|gz(?:compress|open|read|(?:encod|writ)e)|move_uploaded_file|read(?:dir|(?:gz){0,1}file)|s(?:candir|ession_start)|(?:bz|proc_)open)|\\\\$_(?:session|(?:ge| ..." at RESPONSE_BODY. [file "/etc/httpd/conf/modsecurity.d/rules/comodo_free/16_Outgoing_FilterPHP.conf"] [line "17"] [id "214620"] [rev "1"] [msg "COMODO WAF: PHP source code leakage||staging.domain.nl|F|3"] [data "Matched Data: call_user_func found within RESPONSE_BODY: <!DOCTYPE html>\\x0d\\x0a<html lang=\\x22nl-NL\\x22>\\x0d\\x0a<head>\\x0d\\x0a<meta charset=\\x22UTF-8\\x22>\\x0d\\x0a<meta name=\\x22viewport\\x22 content=\\x22width=device-width, initial-scale=1\\x22>\\x0d\\x0a<link rel=\\x22profile\\x22 href=\\x22https://gmpg.org/xfn/11\\x22>\\x0d\\x0a\\x0d\\x0a<title>FPD products – domain</title>\\x0a<meta name='robots' content='noindex, nofollow' />\\x0a<link rel='dns-prefetch' href='//stats.wp.com' />\\x0a<lin [hostname "staging.domain.nl"] [uri "/index.php"] [unique_id "ZP-intSbLAZgSve2kf6qCgAAAM8"], referer: https://staging.domain.nl/wp-admin/admin.php?page=elementor-app&ver=3.15.3 Apache error
2023-09-12 06:01:35 Error xxxx:xxxx:1001:f8dc:ec06:c64e:c4c5:9f49 [client xxxx:xxxx:1001:f8dc:ec06:c64e:c4c5:9f49] ModSecurity: Warning. Operator GE matched 4 at TX:outgoing_points. [file "/etc/httpd/conf/modsecurity.d/rules/comodo_free/20_Outgoing_FiltersEnd.conf"] [line "38"] [id "214940"] [rev "2"] [msg "COMODO WAF: Outbound Points Exceeded| Total Points: 4|staging.domain.nl|F|2"] [severity "CRITICAL"] [tag "CWAF"] [tag "FiltersEnd"] [hostname "staging.domain.nl"] [uri "/index.php"] [unique_id "ZP-intSbLAZgSve2kf6qCgAAAM8"], referer: https://staging.domain.nl/wp-admin/admin.php?page=elementor-app&ver=3.15.3So I had to add the IDs to the Web Application Firewall of Plesk to exclude them
