After migration not able to upload in elfinder, showing error

Your software
My Mautic version is: 4.4.10
My PHP version is:8.0
My Database type and version is:

while uploading in the media manager showing server error 500.

Invalid backend response.
An error occurred on the server side.
HTTP error 500

error log is this

PHP Warning: Invalid callback elFinderSession::session_start_error, cannot access protected method elFinderSession::session_start_error() /public_html/vendor/symfony/http-foundation/Session/Storage/Handler/StrictSessionHandler.php on line 106