Migrating pimcore 10.6 version to 11.0, composer udpate got success, error in migration

Hi Team,

Im trying to update pimcore v 10.6.9 to v 11.0

After composer update is successful, i executed bin/console doctrine:migrations:migrate command getting button error

How to implement button layout custom ? can i get the reference for this with js and how to call it in classes?

is there any other layout which i can use instead button ?

please refer the below link for the error screenshots

https://imgur.com/a/lKRoYHc

The github links which are given in the documents of custom layout button are not opening, getting error page, those files are not exists in the version link given, none of the links are working from the documents given.

Documents are not clear, where to add js and php files if created custom? how to call it and how to use it ?

i have created button.php file inside the path var/classes/Layout/ is it right way?

js file where to add ? we should add js files in the bundle where we needed ?

php file how to call in the class or in the class admin UI?

Can anyone suggest or give the idea to solve this issue?

Thanks in advance

Thejaswini Rao U