cannot serialize xmlrpcresp objects whose content is native php values

[Tsokotsa]

I have a mailscanner running with mailwatch on a centralized environment. It is installed on Centos 7.9 with PHP 5.4.16 I have other clients running Mailscanner and everything works ok. However when emails are detected as SPAM, i am unable to view the area to release emails, and when i enable debug below is the error i get:

--GOT--- HTTP/1.1 200 OK Date: Mon, 12 Jun 2023 06:01:32 GMT Server: Apache/2.4.53 (CentOS Stream) X-Powered-By: PHP/8.0.27 X-XSS-Protection: 1; mode=block X-Frame-Options: SAMEORIGIN X-Content-Type-Options: nosniff Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate Pragma: no-cache Set-Cookie: MW_LANG=en; path=/ Set-Cookie: PHPSESSID=oer0vriljoid6qn1eg6sosnrhq; path=/; HttpOnly Connection: close Content-Type: text/html; charset=UTF-8

cannot serialize xmlrpcresp objects whose content is native php values ---END--- HEADER: Date: Mon, 12 Jun 2023 06:01:32 GMT HEADER: Server: Apache/2.4.53 (CentOS Stream) HEADER: X-Powered-By: PHP/8.0.27 HEADER: X-XSS-Protection: 1; mode=block HEADER: X-Frame-Options: SAMEORIGIN HEADER: X-Content-Type-Options: nosniff HEADER: Expires: Thu, 19 Nov 1981 08:52:00 GMT HEADER: Cache-Control: no-store, no-cache, must-revalidate HEADER: Pragma: no-cache HEADER: Set-Cookie: PHPSESSID=oer0vriljoid6qn1eg6sosnrhq; path=/; HttpOnly HEADER: Connection: close HEADER: Content-Type: text/html; charset=UTF-8 XML error at line 1, check URL XML-RPC Error: Invalid return payload: enable debugging to examine incoming payload (XML error at line 1, check URL)

================== on the client side i use Centos Stream 9 and php 8.0.27

i am running postfix on both systems, apache.

I tried changing the xmlrpc version to 1.1 and still i get the same error. the current installed xml is 3.0 BETA. mailwatch version 1.2.10