Mail fetcher - Excessive errors processing emails

[Franck-ZINDEX]

Prerequisites

• [ ❓ ] Can you reproduce the problem in a fresh installation of the "develop" branch?
• [ ❌ ] Do you have any errors in the PHP error log, or javascript console?
• [ ✅ ] Did you check the osTicket forums?
• [ ✅ ] Did you perform a cursory search to see if your bug or enhancement is already reported?

Description

Mail fetcher doesn't create tickets :

Excessive errors processing emails for ssl://xxx.xxx.xx:993/IMAP (Support [<xxxx@xxxxx.fr>](mailto:xxxx@xxxxxx.fr)).

Please manually check the Fetch Folder () [1/20 - 0/1]

After some investigation, i get error on json_decode, line 1358 in file include/class.dynamic_forms.php when he try to get attached file.

PHP Fatal error:  Uncaught TypeError: json_decode(): Argument #1 ($json) must be of type string, array given in /ostickets/include/class.dynamic_forms.php:1358
Stack trace:
#0 /ostickets/include/class.dynamic_forms.php(1358): json_decode()
#1 /ostickets/include/class.dynamic_forms.php(1316): DynamicFormEntry->saveAnswers()
#2 /ostickets/include/class.ticket.php(4392): DynamicFormEntry->save()
#3 /ostickets/include/api.tickets.php(142): Ticket::create()
#4 /ostickets/include/api.tickets.php(210): TicketApiController->createTicket()
#5 /ostickets/include/api.tickets.php(267): TicketApiController->processEmail()
#6 /ostickets/api/pipe.php(26): PipeApiController::process()
#7 {main}
  thrown in /ostickets/include/class.dynamic_forms.php on line 1358

This error appear with this command (found on your forum) :
php8.1 api/pipe.php < test.eml

If i return blank $fieldClean value at this line, the ticket is created with all datas.

EDIT : Found a fix at line 1358 in include/class.dynamic_forms.php :

❌ Cause error

$fieldClean = json_decode($fieldClean[0], true);

✅ Fix, $fieldClean[0] is already an array

$fieldClean = $fieldClean[0];

Steps to Reproduce

1. Configure Mail Fetcher with IMAP, port 993, Move mail to folder
2. Launch manually or with cron to fetch mail
3. Error appear in OsTickets logs and sent by mail

Expected behavior:

Get ticket created

Actual behavior:

Get Error

Versions

EML file who cause error : https://pastebin.com/qeZbR7sS
Password : npaz44rcVp