After filling all the mandatory field we are blocked with alert message as"Thank you for filling all

[mohan babu]

Thank you for filling all fields below marked with * alert message is displayed after filling all mandatory fields.

Please find the attachment for more detail

[Gundlupet Sreenidhi]

This looks like an error based on a custom workflow. Please contact your JIRA administrator to have this resolved. 

Based on what is shown - there is some code which is running where a 'replace' function is trying to be executed. 

If you are running the method as part of the ScriptRunner plugin - you need to fix your code: 

yourString.replace("old", "new")