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Issue Error 500 accessing mailing lists

SalvadorS

Regular Pleskian
Server operating system version
Debian 12.5
Plesk version and microupdate number
18.0.59 #2
Hello,

I have mailman3 installed in a Debian 12.5 server with php 8.1. If I go to domain -> mail -> Mailing list I received a screen with this error:

Anyone can help me?

500 TypeError​

count(): Argument #1 ($value) must be of type Countable|array, bool given
TypeTypeError
Messagecount(): Argument #1 ($value) must be of type Countable|array, bool given
FileMailLists.php
Line116
 
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