diff --git a/conf/sql/common.sql b/conf/sql/common.sql
deleted file mode 100644
index c56f29f..0000000
--- a/conf/sql/common.sql
+++ /dev/null
@@ -1 +0,0 @@
-INSERT INTO wp_options VALUES('','http_authentication_options','a:8:{s:13:"allow_wp_auth";b:1;s:10:"auth_label";s:19:"HTTP authentication";s:9:"login_uri";s:40:"https://__DOMAIN_PATH__/wp-login.php";s:10:"logout_uri";s:28:"https://__DOMAIN_PATH__/";s:22:"additional_server_keys";s:13:"PHP_AUTH_USER";s:24:"auto_create_email_domain";s:0:"";s:10:"db_version";i:2;s:16:"auto_create_user";b:0;}','yes');
diff --git a/scripts/install b/scripts/install
index 97a2802..5cc709b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -176,9 +176,6 @@ $wpcli_alias plugin install companion-auto-update
 ynh_replace_string "__DOMAIN_PATH__" "$domain$path_url" ../conf/sql/*.sql
 ynh_replace_string "__DATE__" "$(date +%s)" ../conf/sql/*.sql
 
-# Charge les commandes sql communes à tous les scripts.
-ynh_mysql_connect_as $db_name $db_pwd $db_name < ../conf/sql/common.sql
-
 #=================================================
 # SET LANGUAGE
 #=================================================
@@ -203,17 +200,19 @@ then
 	ynh_replace_string "//--MULTISITE2--define" "define" $final_path/wp-config.php
 
 	ynh_mysql_connect_as $db_name $db_pwd $db_name < ../conf/sql/multisite.sql
+	plugin_network="--network"
 else
 	ynh_mysql_connect_as $db_name $db_pwd $db_name < ../conf/sql/single.sql
+	plugin_network=""
 fi
 
 #=================================================
 # ACTIVATE WORDPRESS' PLUGINS
 #=================================================
 
-$wpcli_alias plugin activate simple-ldap-login
-$wpcli_alias plugin activate http-authentication
-$wpcli_alias plugin activate companion-auto-update
+$wpcli_alias plugin activate simple-ldap-login $plugin_network
+# Do not activate http-authentication, this plugin is sometimes unstable
+$wpcli_alias plugin activate companion-auto-update $plugin_network
 
 #=================================================
 # STORE THE CHECKSUM OF THE CONFIG FILE
diff --git a/scripts/upgrade b/scripts/upgrade
index 4af99ef..7a02faa 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -129,8 +129,10 @@ ynh_backup_if_checksum_is_different "$final_path/wp-config.php"
 if [ $multisite -eq 1 ]
 then
 	ynh_replace_string "#--MULTISITE--" "" /etc/nginx/conf.d/$domain.d/$app.conf
+	plugin_network="--network"
 else
 	multisite=0
+	plugin_network=""
 	if [ $is_public -eq 0 ]
 	then
 		ynh_replace_string "#--PRIVATE--" "" /etc/nginx/conf.d/$domain.d/$app.conf
@@ -150,9 +152,11 @@ update_plugin () {
 	( $wpcli_alias plugin is-installed $1 && $wpcli_alias plugin update $1 ) || $wpcli_alias plugin install $1
 }
 update_plugin simple-ldap-login
-update_plugin http-authentication
 update_plugin companion-auto-update
-$wpcli_alias plugin activate companion-auto-update
+$wpcli_alias plugin activate companion-auto-update $plugin_network
+
+# Disable broken plugin http-authentication
+$wpcli_alias plugin is-installed http-authentication && $wpcli_alias plugin deactivate http-authentication
 
 #=================================================
 # STORE THE CHECKSUM OF THE CONFIG FILE