Hello, I trying to install the new roundcube with php 8.1 and I get an error
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Normal index.ph with some php code works wery well
apache2/error.log
[Wed Oct 12 10:28:42.413565 2022] [php:error] [pid 45989] [client 192.168.80.238:55297] PHP Fatal error: Uncaught Error: Call to undefined function mb_internal_encoding() in /var/www/roundcube/program/lib/Roundcube/bootstrap.php:86\nStack trace:\n#0 /var/www/roundcube/program/include/iniset.php(78): require_once()\n#1 /var/www/roundcube/index.php(40): require_once('...')\n#2 {main}\n thrown in /var/www/roundcube/program/lib/Roundcube/bootstrap.php on line 86
roundcube/logs
[12-Oct-2022 10:13:01 +0200]: <2kgp6hh7> DB Error: SQLSTATE[HY000] [1045] Access denied for user 'roundcube'@'localhost' (using password: NO) in /var/www/roundcube/program/lib/Roundcube/rcube_db.php on line 200 (GET /)
[PHP Modules]
bcmath
calendar
Core
ctype
curl
date
dom
exif
FFI
fileinfo
filter
ftp
gd
gettext
hash
iconv
intl
json
libxml
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
Phar
posix
readline
Reflection
session
shmop
SimpleXML
sockets
sodium
SPL
standard
sysvmsg
sysvsem
sysvshm
tokenizer
xml
xmlreader
xmlwriter
xsl
Zend OPcache
zip
zlib
[Zend Modules]
Zend OPcache
Can someone help me ?