Compile error, mobiledetectlib

Dear Peter

Running on Joomla 4.4.1, PHP 8.1.26, I get the following error when trying to load some of the menu items:
Fatal error: Declaration of Detection\Cache\Cache::get(string $key, mixed $default = null): ?Detection\Cache\CacheItem must be compatible with Psr\SimpleCache\CacheInterface::get($key, $default = null) in /home/httpd/vhosts/[WHATEVER]/libraries/regularlabs/vendor/mobiledetect/mobiledetectlib/src/Cache/Cache.php on line 30

Regards,