Alert is not appearing

Summary:

Unable to see the custom alert has been created which is appearing at worksheet column but inside not appearing.

Content (required):

After starting the WFC plan all thing working fine but unable to see the custom alert which were enabled. Although the column heading is appearing but the condition or information is not visible.

is there any things need to do

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

21d

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