Saving credentials from block shows error, creds are saved.

[peterwilsoncc]

Describe the bug

When logged in as an admin, the block shows a prompt to save credentials if that has not already been done.

When they are saved an error message is shown "setting getter only property 'target'" and the block continues to display the credentials prompt. This error message is incorrect as the settings are saved.

Steps to Reproduce

1. Delete the entry maps_block_apple from the wp_options table, if required
2. Log in to WordPress as an administrator
3. Add Post
4. Insert Apple Maps block
5. Save post
6. Observe prompt for credentials
7. Populate the credentials and save the settings
8. Observe the error message
9. Reload the post
10. Observe the map block is displayed with location selection

Screenshots, screen recording, code snippet

Cropped gif to avoid showing credentials.

Environment information

• OS: MacOS 15.7.2
• Browser: Firefox 146.0.1

WordPress information

Site Health Info

### wp-core ###

version: 6.9.1-alpha-61393
site_language: en_US
user_language: en_US
timezone: +00:00
permalink: /%year%/%monthnum%/%day%/%postname%/
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: /vagrant/wp-build
wordpress_size: 736.70 MB (772490877 bytes)
uploads_path: /vagrant/content/uploads
uploads_size: 0.00 B (0 bytes)
themes_path: /vagrant/content/themes
themes_size: directory not found
plugins_path: /vagrant/content/plugins
plugins_size: 5.35 GB (5742180790 bytes)
fonts_path: /vagrant/content/uploads/fonts
fonts_size: directory not found
database_size: 2.11 MB (2211840 bytes)
total_size: 6.07 GB (6516883507 bytes)

### wp-dropins (1) ###

db.php: true

### wp-active-theme ###

name: Twenty Twenty-Five (twentytwentyfive)
version: 1.4
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: /vagrant/wp-build/wp-content/themes/twentytwentyfive

### wp-themes-inactive (14) ###

Twenty Eleven: version: 5.0, author: the WordPress team
Twenty Fifteen: version: 4.1, author: the WordPress team
Twenty Fourteen: version: 4.4, author: the WordPress team
Twenty Nineteen: version: 3.2, author: the WordPress team
Twenty Seventeen: version: 4.0, author: the WordPress team
Twenty Sixteen: version: 3.7, author: the WordPress team
Twenty Ten: version: 4.5, author: the WordPress team
Twenty Thirteen: version: 4.5, author: the WordPress team
Twenty Twelve: version: 4.7, author: the WordPress team
Twenty Twenty: version: 3.0, author: the WordPress team
Twenty Twenty-Four: version: 1.4, author: the WordPress team
Twenty Twenty-One: version: 2.7, author: the WordPress team
Twenty Twenty-Three: version: 1.6, author: the WordPress team
Twenty Twenty-Two: version: 2.1, author: the WordPress team

### wp-mu-plugins (2) ###

bypass-ssl-check.php: author: (undefined), version: (undefined)
testing-db-qs.php: author: (undefined), version: (undefined)

### wp-plugins-active (1) ###

Block for Apple Maps: version: 1.1.5, author: 10up

### wp-plugins-inactive (21) ###

Ads.txt Manager: version: 1.4.6, author: 10up
Autopost for X (formerly Autoshare for Twitter): version: 2.3.1, author: 10up
Block Catalog: version: 1.6.2, author: 10up
Classic Editor: version: 1.6.7, author: WordPress Contributors
Convert to Blocks: version: 1.3.4, author: 10up
Eight Day Week: version: 1.2.6, author: 10up
Insecure Content Warning: version: 1.2.2, author: 10up
Insert Special Characters: version: 1.1.3, author: 10up
Microsoft Azure Storage for WordPress: version: 4.5.2, author: 10up, Microsoft Open Technologies
New Relic Reporting for WordPress: version: 1.3.3, author: 10up
Object Cache Pro: version: 1.24.3, author: Rhubarb Group
Public Post Preview: version: 3.0.1, author: Dominik Schilling
Query Monitor: version: 3.20.2, author: John Blackbourn
Restricted Site Access: version: 7.6.1, author: 10up
Retro Winamp Block: version: 1.3.3, author: 10up
Safe Redirect Manager: version: 2.2.2, author: 10up
Safe SVG: version: 2.4.0, author: 10up
Simple Local Avatars: version: 2.8.5, author: 10up
Simple Page Ordering: version: 2.7.4, author: 10up
Simple Podcasting: version: 1.9.1, author: 10up
User Switching: version: 1.11.1, author: John Blackbourn

### wp-media ###

image_editor: WP_Image_Editor_GD
imagick_module_version: Not available
imagemagick_version: Not available
imagick_version: Not available
file_uploads: 1
post_max_size: 1024M
upload_max_filesize: 1024M
max_effective_size: 1 GB
max_file_uploads: 20
image_format_transforms: image/heic → image/jpeg, image/heif → image/jpeg, image/heic-sequence → image/jpeg, image/heif-sequence → image/jpeg
gd_version: 2.3.3
gd_formats: GIF, JPEG, PNG, WebP, BMP, AVIF, XPM
ghostscript_version: not available

### wp-server ###

server_architecture: Linux 5.15.0-92-generic aarch64
httpd_software: nginx/1.18.0
php_version: 8.2.30 64bit
php_sapi: fpm-fcgi
max_input_variables: 1000
time_limit: 900
memory_limit: 128M
admin_memory_limit: 256M
max_input_time: 900
upload_max_filesize: 1024M
php_post_max_size: 1024M
curl_version: 7.81.0 OpenSSL/3.0.2
suhosin: false
imagick_availability: false
pretty_permalinks: true
static_robotstxt_file: false
current: 2026-01-04T23:34:55+00:00
utc-time: Sunday, 04-Jan-26 23:34:55 UTC
server-time: 2026-01-04T23:34:51+00:00

### wp-database ###

extension: mysqli
server_version: 8.0.36-0ubuntu0.22.04.1
client_version: mysqlnd 8.2.30
max_allowed_packet: 16777216
max_connections: 151

### wp-constants ###

WP_HOME: http://xu-osp-plugins.local
WP_SITEURL: http://xu-osp-plugins.local/wp
WP_CONTENT_DIR: /vagrant/content
WP_PLUGIN_DIR: /vagrant/content/plugins
WP_MEMORY_LIMIT: 40M
WP_MAX_MEMORY_LIMIT: 256M
WP_DEBUG: true
WP_DEBUG_DISPLAY: false
WP_DEBUG_LOG: /vagrant/content/debug.log
SCRIPT_DEBUG: false
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: does not exist
mu-plugins: writable

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