Hi Team,
Greetings!
While solving issues, might be you have come across this issue in an email campaign when user is sending Email Campaign.
PFB:
Here are the checks which can be done.
Please check the following things if you ever come across such an issue.
1- User Role if changed recently to Marketing User.
2- issue can be raised Manikanta Gupta Sir for further evaluation.
This issue came as there is an error in WAF ( Web Application Firewall ) WAF is used to handle malicious input.
This is for security Purposes.
