Undefined index: ShowImages ... Actions.php on line 800

[yeupou]

Hello,

With the current version, I often get in PHP FPM logs the following:

FastCGI sent in stderr: "PHP message: PHP Notice: Undefined index: ShowImages in /usr/share/snappymail/snappymail/v/2.25.2/app/libraries/RainLoop/Actions.php on line 800" while reading response header from upstream, client: XXXXX, server: ~^mx, request: "GET /?/AppData/0/7320358412986374/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.4-fpm.sock:", host: "XXXX", referrer: "https://XXXX"

To Reproduce

1. Load the main page
2. check nginx error log

Please complete the following information:

• Browser: Firefox 109 on Devuan
• IMAP daemon: dovecot
• PHP version: 7.4
• SnappyMail Version: 2.25.2

Debug/logging information
(tried to activate but produced no extra logs)

Additional context
I noticed the issue because the webmail is almost unusable for one user on one specific folder (work folder with lot of mails, long threads, some big attachments).

On a few thread, when the user click to load a mail, it takes ages, load, but the page interface is no longer responsive. it is possible to scroll but click make no effect. Other tabs are unaffected and opening snappymail is another tab works.

(I will post another issue because it might be a distinct problem).

Thanks for your good work.