Error establishing a database connection

Site: https://www.camarotesapucai.com/
Error establishing a database connection

Após migração da dotblock para a hostgator o site apresenta esse erro.

MInha suspeita é que algum plugin de segurança instalado tenha dado conflito.
Plugins de segurança instalados: Shield, Ninjafirewall e wp all

Acredito que seja necessário chegar as credenciais no wp-config de user/ login e etc.

Abaixo o log.

5_0.MAI); waiting for someone to free some space... (Errno: 28 "No space left on device") para a consulta show full columns from `cmt2019_options` feita por a_mvc_fs->cache_lookups, c_photocrati_transient_manager::update, c_photocrati_transient_manager->set, set_transient, update_option
[10-mar-2020 14:35:21 utc] php fatal error:  uncaught error: call to a member function getlicensehandler() on null in /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/lib/src/controller/controller.php:1646
Stack trace:
#0 /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/features/base.php(1241): FernleafSystems\Wordpress\Plugin\Shield\Controller\Controller->isPremiumActive()
#1 /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/features/base.php(979): ICWP_WPSF_FeatureHandler_Base->isPremium()
#2 /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/features/base.php(972): ICWP_WPSF_FeatureHandler_Base->store()
#3 /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/features/base.php(435): ICWP_WPSF_FeatureHandler_Base->saveModOptions()
#4 /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/features/plugin.php(57): ICWP_WPSF_FeatureHandler_Base->onPluginShutdown()
#5 /home/camarotesapucai/public_html/wp-inclu in /home/camarotesapucai/public_html/wp-content/plugins/wp-simple-firewall/src/lib/src/Controller/Controller.php on line 1646
[10-Apr-2020 04:59:25 utc] php warning:  mysqli_real_connect(): (hy000/1045): access denied for user 'camarotesapucai_wp'@'localhost' (using password: yes) in /home/camarotesapucai/public_html/wp-includes/wp-db.php on line 1633
[10-Apr-2020 05:00:32 utc] php warning:  mysqli_real_connect(): (hy000/1045): access denied for user 'camarotesapucai_wpmajesty'@'localhost' (using password: yes) in /home/camarotesapucai/public_html/wp-includes/wp-db.php on line 1633
[10-Apr-2020 05:00:36 utc] php warning:  mysqli_real_connect(): (hy000/1045): access denied for user 'camarotesapucai_wpmajesty'@'localhost' (using password: yes) in /home/camarotesapucai/public_html/wp-includes/wp-db.php on line 1633