Unsubscribe confirmation goes to 404

[MaxwellGarceau]

Describe the bug

Related to #92

After unsubscribing from a mailing list, the link to return to the website goes to a 404 page.

Steps to Reproduce

1. Navigate to /wp-admin/admin.php?page=mailchimp_sf_options and set "Include Unsubscribe link?" to checked
2. Subscribe to a list with a test email. Verify your email if you have to.
3. Navigate to any FE Mailchimp web form and click the "unsubscribe from list" link in the footer
4. Unsubscribe the email you subscribed earlier
5. Click the "« return to our website" link and you will be navigated to a 404 page

Screenshots, screen recording, code snippet

Unsubscribe landing page bug walkthrough

unsubscribe-landing-page-bug-walkthrough.mov

Default unsubscribe landing page

Environment information

• Macbook Air
• OS: 14.6
• Chrome 131.0.6778.205

WordPress information

`

wp-core

version: 6.7.1
site_language: en_US
user_language: en_US
timezone: +00:00
permalink: undefined
https_status: false
multisite: false
user_registration: 0
blog_public: 1
default_comment_status: open
environment_type: local
user_count: 1
dotorg_communication: true

wp-paths-sizes

wordpress_path: /var/www/html
wordpress_size: 267.05 MB (280024919 bytes)
uploads_path: /var/www/html/wp-content/uploads
uploads_size: 0.00 B (0 bytes)
themes_path: /var/www/html/wp-content/themes
themes_size: 44.76 MB (46934953 bytes)
plugins_path: /var/www/html/wp-content/plugins
plugins_size: 378.09 MB (396457466 bytes)
fonts_path: /var/www/html/wp-content/uploads/fonts
fonts_size: directory not found
database_size: 4.72 MB (4947968 bytes)
total_size: 694.62 MB (728365306 bytes)

wp-active-theme

name: Twenty Twenty-Five (twentytwentyfive)
version: 1.0
author: the WordPress team
author_website: https://wordpress.org
parent_theme: none
theme_features: core-block-patterns, post-thumbnails, responsive-embeds, editor-styles, html5, automatic-feed-links, widgets-block-editor, block-templates, post-formats, editor-style
theme_path: /var/www/html/wp-content/themes/twentytwentyfive
auto_update: Disabled

wp-themes-inactive (14)

Twenty Eleven: version: 4.8, author: the WordPress team, Auto-updates disabled
Twenty Fifteen: version: 3.9, author: the WordPress team, Auto-updates disabled
Twenty Fourteen: version: 4.1, author: the WordPress team, Auto-updates disabled
Twenty Nineteen: version: 3.0, author: the WordPress team, Auto-updates disabled
Twenty Seventeen: version: 3.8, author: the WordPress team, Auto-updates disabled
Twenty Sixteen: version: 3.4, author: the WordPress team, Auto-updates disabled
Twenty Ten: version: 4.3, author: the WordPress team, Auto-updates disabled
Twenty Thirteen: version: 4.3, author: the WordPress team, Auto-updates disabled
Twenty Twelve: version: 4.4, author: the WordPress team, Auto-updates disabled
Twenty Twenty: version: 2.8, author: the WordPress team, Auto-updates disabled
Twenty Twenty-Four: version: 1.3, author: the WordPress team, Auto-updates disabled
Twenty Twenty-One: version: 2.4, author: the WordPress team, Auto-updates disabled
Twenty Twenty-Three: version: 1.6, author: the WordPress team, Auto-updates disabled
Twenty Twenty-Two: version: 1.9, author: the WordPress team, Auto-updates disabled

wp-plugins-active (1)

Mailchimp: version: 1.6.2, author: Mailchimp, Auto-updates disabled

wp-plugins-inactive (1)

Hello Dolly: version: 1.7.2, author: Matt Mullenweg, Auto-updates disabled

wp-media

image_editor: WP_Image_Editor_Imagick
imagick_module_version: 1691
imagemagick_version: ImageMagick 6.9.11-60 Q16 aarch64 2021-01-25 https://imagemagick.org
imagick_version: 3.7.0
file_uploads: 1
post_max_size: 1G
upload_max_filesize: 1G
max_effective_size: 1 GB
max_file_uploads: 20
imagick_limits:
imagick::RESOURCETYPE_AREA: 122 MB
imagick::RESOURCETYPE_DISK: 1073741824
imagick::RESOURCETYPE_FILE: 786432
imagick::RESOURCETYPE_MAP: 512 MB
imagick::RESOURCETYPE_MEMORY: 256 MB
imagick::RESOURCETYPE_THREAD: 1
imagick::RESOURCETYPE_TIME: 9.2233720368548E+18
imagemagick_file_formats: 3FR, 3G2, 3GP, AAI, AI, APNG, ART, ARW, AVI, AVIF, AVS, BGR, BGRA, BGRO, BIE, BMP, BMP2, BMP3, BRF, CAL, CALS, CANVAS, CAPTION, CIN, CIP, CLIP, CMYK, CMYKA, CR2, CR3, CRW, CUR, CUT, DATA, DCM, DCR, DCX, DDS, DFONT, DNG, DPX, DXT1, DXT5, EPDF, EPI, EPS, EPS2, EPS3, EPSF, EPSI, EPT, EPT2, EPT3, ERF, FAX, FILE, FITS, FRACTAL, FTP, FTS, G3, G4, GIF, GIF87, GRADIENT, GRAY, GRAYA, GROUP4, H, HALD, HDR, HEIC, HISTOGRAM, HRZ, HTM, HTML, HTTP, HTTPS, ICB, ICO, ICON, IIQ, INFO, INLINE, IPL, ISOBRL, ISOBRL6, J2C, J2K, JBG, JBIG, JNG, JNX, JP2, JPC, JPE, JPEG, JPG, JPM, JPS, JPT, JSON, K25, KDC, LABEL, M2V, M4V, MAC, MAGICK, MAP, MASK, MAT, MATTE, MEF, MIFF, MKV, MNG, MONO, MOV, MP4, MPC, MPG, MRW, MSL, MTV, MVG, NEF, NRW, NULL, ORF, OTB, OTF, PAL, PALM, PAM, PATTERN, PBM, PCD, PCDS, PCL, PCT, PCX, PDB, PDF, PDFA, PEF, PES, PFA, PFB, PFM, PGM, PGX, PICON, PICT, PIX, PJPEG, PLASMA, PNG, PNG00, PNG24, PNG32, PNG48, PNG64, PNG8, PNM, POCKETMOD, PPM, PREVIEW, PS, PS2, PS3, PSB, PSD, PTIF, PWP, RADIAL-GRADIENT, RAF, RAS, RAW, RGB, RGBA, RGBO, RGF, RLA, RLE, RMF, RW2, SCR, SCT, SFW, SGI, SHTML, SIX, SIXEL, SPARSE-COLOR, SR2, SRF, STEGANO, SUN, TEXT, TGA, THUMBNAIL, TIFF, TIFF64, TILE, TIM, TTC, TTF, TXT, UBRL, UBRL6, UIL, UYVY, VDA, VICAR, VID, VIDEO, VIFF, VIPS, VST, WBMP, WEBM, WEBP, WMV, WPG, X, X3F, XBM, XC, XCF, XPM, XPS, XV, XWD, YCbCr, YCbCrA, YUV
gd_version: bundled (2.1.0 compatible)
gd_formats: GIF, JPEG, PNG, WebP, BMP, AVIF
ghostscript_version: 10.00.0

wp-server

server_architecture: Linux 6.10.14-linuxkit aarch64
httpd_software: Apache/2.4.62 (Debian)
php_version: 8.2.27 64bit
php_sapi: apache2handler
max_input_variables: 1000
time_limit: 30
memory_limit: 128M
admin_memory_limit: 256M
max_input_time: -1
upload_max_filesize: 1G
php_post_max_size: 1G
curl_version: 7.88.1 OpenSSL/3.0.15
suhosin: false
imagick_availability: true
pretty_permalinks: true
current: 2024-12-24T18:29:24+00:00
utc-time: Tuesday, 24-Dec-24 18:29:24 UTC
server-time: 2024-12-24T18:29:24+00:00

wp-database

extension: mysqli
server_version: 11.4.4-MariaDB-ubu2404
client_version: mysqlnd 8.2.27
max_allowed_packet: 16777216
max_connections: 151

wp-constants

WP_HOME: http://localhost:8888
WP_SITEURL: http://localhost:8888
WP_CONTENT_DIR: /var/www/html/wp-content
WP_PLUGIN_DIR: /var/www/html/wp-content/plugins
WP_MEMORY_LIMIT: 40M
WP_MAX_MEMORY_LIMIT: 256M
WP_DEBUG: true
WP_DEBUG_DISPLAY: true
WP_DEBUG_LOG: false
SCRIPT_DEBUG: true
WP_CACHE: false
CONCATENATE_SCRIPTS: undefined
COMPRESS_SCRIPTS: undefined
COMPRESS_CSS: undefined
WP_ENVIRONMENT_TYPE: local
WP_DEVELOPMENT_MODE: undefined
DB_CHARSET: utf8
DB_COLLATE: undefined

wp-filesystem

wordpress: writable
wp-content: writable
uploads: writable
plugins: writable
themes: writable
fonts: not writable

`

Code of Conduct

• I agree to follow this project's Code of Conduct

[MaxwellGarceau]

This issue is not solvable through the Mailchimp API. Alternative proposal discussed in #92 (comment)