Unable to add comments in the case note section.

This article provides insights into the reasons behind the customer's inability to add comments in the case note section.

When a user encountered an error preventing them from adding comments to a case not section, they received the message shown in the attached screenshot. Please provide the following information to the user:

1:The user who attempted to make a comment was unable to do so due to their lack of access to the "Apex Class Objects" in Salesforce CRM. This setting must be enabled by the customer for the user profile in question to allow access. It is important to ensure that the user has Apex Class access to avoid such issues in the future. 

2: Apex Class Access needs to be enabled by their CRM admin.

Note : This option is available only when SFDC plugin is enabled on the CRM to writeback SupportLogic to Salesforce Refer the link about Installing SFDC Plugin