Viewing Show Snippet under DLP logs throw an error message "snippets not found"

• When viewing Show Snippet under DLP logs on the GUI it would show an error message "snippets not found"
• DLP log file prints errors similar to the following 

ERROR: [dlp-op-cmds] Tenant: Tenant_ID, Result: error, Message: snippets not found
ERROR: [dlp-op-cmds] Tenant: Tenant_ID, Result: error, Message: Unable to fetch snippets as data pattern is ML pattern

• Panorama
• Enterprise DLP plugin 

• The behavior is that we don't show the snippet if the pattern is not regex based and the files is older than 90 days. it would be expected since we don't give snippets for ML generated regexes.

1. there is a regex pattern match 
2. the files are no older than 90 days