Hello @Maggi_Mentis - welcome to the Bitwarden community forums, and sorry to hear that you have lost your master password.
I hate to be the bearer of bad news, but Bitwarden has absolutely no knowledge of your password, to ensure strong security and privacy, so there is no way to ‘retrieve’ it if you have lost it. See more in the FAQ here:
You might also find this post helpful:
Regarding self-recovery there are two options, if you have enabled them, that will help. First, if you designated an emergency contact with takeover privileges, they can take over your account and create a new password. Second, if you have created a recent export (backup) of your vault contents, it is possible to create a brand new account and restore your vault data from the backup (note that your password history, items in the trash bin, file attachments, and are not backed up and will be lost).
For future reference, here is an article about best practices for backup up your vault to prevent such issues from happening again in the future: