WebClient (Phpmailer_Language) ERROR

Hello,

Yesterday, We upgraded our server and all customers can't send email from Webmail. They are getting a PHPMailer_Language error. 

I checked post : https://support.icewarp.com/hc/en-us/community/posts/360011338718-Getting-PHPMailer-Language-error?input_string=WebClient%20(Phpmailer_Language)%20ERROR

All users as Mailbox type : IMAP & POP3

My server is running on CentOS 7.9.2009

Icewarp version : Deep Castle 1