Unable to send message from SR details Page

Summary:

After creating the SR, we're trying to restrict users from changing description titles and categories by making them read-only and want to make sure all. Modes of communication should go through Messages; however, it throws 502 when tested in preview mode and 400 when we test in live application

Content (required):

DCS message, SR details page

Version (include the version you are using, if applicable):

Release

2207

Visual Builder Runtime Version

2207.0.0

Oracle JET Version

12.0.4

Code Snippet (add any code snippets that support your topic, if applicable):

{

"ChannelTypeCd":"ORA_SVC_WEB",

"MessageContent":"dGVzdGluZw==",

"MessageTypeCd":"ORA_SVC_CUSTOMER_ENTRY",

"SourceCd":"ORA_SVC_CUSTOMER_UI",