Restoring Encrypted Backup

See Disable iOS backup encryption - Apple Community. As already noted there is no workaround, you will either need to work out what password was used or start afresh.

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Well, password do not setup itself and you normally you need to verify the password used.

FYI. With encrypted backup, you do not need the password to backup.

You only needs it when you restore from that backup.

Without the password, you cannot use the backup, this is a security feature which you have enabled.

There's no workaround or bypass.

As said, some time earlier the encrypted backup check box is selected.

You might not remember or it's your company policy if your iPhone is connected to your company.

Again you do NOT need the password to backup, you only need password when you want to restore.

Sorry, there's no workaround for that so there's no help except to restore as new without the backup.

No, there's no solution if you forgets (or don't remember)

The article says what I've already told you, it will not change.

There's no bypass or workaround for encrypted backup if you don't have the password.

Yes, you have already told us.

The answer is still the same, read this article from Apple: About encrypted backups in iTunes - Apple Support