Roundcube unresponsive after curl error

[tlweb]

Hi,

This is the first time i'm posting here. I've got a problem with Roundcibe 1.6.9 on PHP 8.1.

When i open an e-mail from ABN AMRO roundcube becomes completely unresponsive. The PHP stops responding and i can't open new instances in new browsers too.

I get this error in the log of roundcube:

[10-Jan-2025 10:49:51 +0100]: <ar25461d> PHP Error: cURL error 56: TCP connection reset by peer (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://www.abnamro.nl/favicon.ico in /var/www/html/roundcubemail-1.6.9/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php on line 276 (GET /roundcube/?_task=utils&_action=modcss&_u=tmp-889c566a8bee81fcc88394de583c97f7.css&_c=message-htmlpart1&_p=v1)

Anyone has any idea why failing to fetch an image crashes the whole PHP? Seems like this should not happen.

Any help is greatly appreciated.

Kind regards,

Tom