Show all mailboxes/Collapse mailboxes settings not saved, PUT 400

[VeloAddict]

Steps to reproduce

Click on Show all mailboxes/Collapse mailboxes.

Expected behavior

Request to api not to fail.

Actual behavior

PUT /apps/mail/api/preferences/account-settings
Payload

{"key":"account-settings"}

400 Bad Request

{
	"status": "fail",
	"data": {
		"message": "key or value missing",
		"type": "OCA\\Mail\\Exception\\ClientException"
	}
}

Mail app version

5.0.7

Nextcloud version

31.0.4

Mailserver or service

docker-mailserver

Operating system

debian

PHP engine version

PHP 8.3

Nextcloud memory caching

No response

Web server

Nginx

Database

MySQL

Additional info

No response

[ChristophWurst]

Thank you for your report

[ChristophWurst]

I can confirm this bug from a test on a production deployment.

[ChristophWurst]

@GretaD please have a look