Gravity Forms Signature Image Not Displaying in Email Notifications

I’m using Gravity Forms with the Signature Add-On. The signatures display correctly in the form entries in the WordPress backend, but they do not appear properly in email notifications.

Instead of displaying the signature image inline, the email shows a link with a broken-image icon. Clicking the link opens the signature correctly in a web browser, but I would prefer the signature image to be embedded directly in the email.

Has anyone encountered this issue or found a reliable way to display the signature image inline in Gravity Forms notifications?

Gravity Forms

Setting Value
Version 2.10.5 Passes
Upload folder permissions Writable Passes
Output CSS Yes
Default Theme Orbital Theme
No-Conflict Mode Yes
Currency USD
Background Notifications Yes
Background updates Yes
REST API v2 No
Orbital Style Filter No

Add-Ons

Setting Value
Signature by Gravity Forms - 4.9.0 Passes

Database

Setting Value
Database Version 2.10.5 Passes Your database is up-to-date. Warning: downgrading Gravity Forms is not recommended. Re-run database upgrade
wp_f4c42b8c97_gf_form_view Passes
wp_f4c42b8c97_gf_form_meta Passes
wp_f4c42b8c97_gf_form Passes
wp_f4c42b8c97_gf_form_revisions Passes
wp_f4c42b8c97_gf_entry Passes
wp_f4c42b8c97_gf_entry_meta Passes
wp_f4c42b8c97_gf_entry_notes Passes
wp_f4c42b8c97_gf_draft_submissions Passes

Translations

Setting Value
Site Locale en_US
User (ID: 2) Locale en_US
Gravity Forms

WordPress Environment

WordPress

Setting Value
Home URL https://1229143.us8.myftpupload.com
Site URL https://1229143.us8.myftpupload.com
WordPress Version 6.9.5 Passes
WordPress Multisite No
WordPress Memory Limit 40M
WordPress Debug Mode No
WordPress Debug Log No
WordPress Script Debug Mode No
WordPress Cron No
WordPress Alternate Cron No
Background tasks Yes Passes