php warning – Undefined array key “thumbnail_url”

Hi

Since 1.9.102.1 we’re getting the following repeatedly in our error log

[19-Oct-2022 13:07:06 UTC] PHP Warning:  Undefined array key "thumbnail_url" in /home/obfusc/public_html/wp-content/plugins/schema-and-structured-data-for-wp/admin_section/common-function.php on line 3634

[19-Oct-2022 13:07:06 UTC] PHP Warning:  Undefined array key "thumbnail_url" in /home/obfusc/public_html/wp-content/plugins/schema-and-structured-data-for-wp/admin_section/common-function.php on line 3635

All pages continue to pass all markup tests without error. We’re using only “Local Business” and “Course” markups. Thanks for looking.

# WordPress Configuration
Version: 6.0.3
Language: en_GB

# Webserver Configuration
PHP Version: 8.0.24
MySQL Version: 5.7.39
Webserver Info: Apache

# PHP Configuration
Memory Limit: 256M
Upload Max Size: 32M
Post Max Size: 32M
Upload Max Filesize: 32M
Time Limit: 30
Max Input Vars: 1000
Display Errors: N/A

# PHP Extensions
cURL: Supported
fsockopen: Supported
SOAP Client: Installed
Suhosin: Not Installed