Server Error on loading email

[kk6mrp]

🐛 Bugreport

I signed up for a new mailing list and the emails from that sender have a server error on loading:

AH01071: Got error 'PHP message: PHP Fatal error: Uncaught TypeError: explode(): Argument #2 ($string) must be of type string, array given in /usr/local/share/cypht/modules/imap/functions.php:1025\nStack trace:\n#0 /usr/local/share/cypht/modules/imap/functions.php(1025): explode()\n#1 /usr/local/share/cypht/modules/imap/functions.php(1013): process_list_fld()\n#2 /usr/local/share/cypht/modules/imap/handler_modules.php(1669): get_list_headers()\n#3 /usr/local/share/cypht/lib/modules_exec.php(175): Hm_Handler_imap_message_content->process()\n#4 /usr/local/share/cypht/lib/modules_exec.php(153): Hm_Module_Exec->run_handler_module()\n#5 /usr/local/share/cypht/lib/dispatch.php(220): Hm_Module_Exec->run_handler_modules()\n#6 /usr/local/share/cypht/lib/dispatch.php(190): Hm_Dispatch->process_request()\n#7 /usr/local/share/cypht/index.php(50): Hm_Dispatch->__construct()\n#8 {main}\n thrown in /usr/local/share/cypht/modules/imap/functions.php on line 1025'

Version & Environment

Rev: [master]

OS: [Alpine Linux 3.15]

Steps to reproduce

1. Try to open an email and it shows server error and produces this error.