Error replacing PDF file – Invalid argument supplied for foreach

When replacing two PDF files and using default settings, I got the following errors:

Warning: Invalid argument supplied for foreach() in /var/www/REDACTED/wp-content/plugins/enable-media-replace/classes/replacer.php on line 673

Warning: Invalid argument supplied for foreach() in /var/www/REDACTED/wp-content/plugins/enable-media-replace/classes/replacer.php on line 673

Warning: Invalid argument supplied for foreach() in /var/www/REDACTED/wp-content/plugins/enable-media-replace/classes/replacer.php on line 673

Warning: Cannot modify header information - headers already sent by (output started at /var/www/REDACTED/wp-content/plugins/enable-media-replace/classes/replacer.php:673) in /var/www/u0590497/data/www/tiger-optics.ru/wp-includes/pluggable.php on line 1281

Warning: Cannot modify header information - headers already sent by (output started at /var/www/REDACTED/wp-content/plugins/enable-media-replace/classes/replacer.php:673) in /var/www/u0590497/data/www/tiger-optics.ru/wp-includes/pluggable.php on line 1284

When browsing to the Media page after this, I see the following:
There was an issue with updating your image URLS: Search and replace have different amount of values. Aborting updating thumbnails

Also thumbnails are not being generated.

Any ideas?

• This topic was modified 4 years, 4 months ago by mrotter7000.
• This topic was modified 4 years, 4 months ago by mrotter7000.
• This topic was modified 4 years, 4 months ago by mrotter7000.