Upgrade M3: Forbidden You don't have permission to access this resource

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Your software
My PHP version is :
My MySQL/MariaDB version is (delete as applicable): MySQL/MariaDB version

Updating/Installing Errors
I am (delete as applicable): Installing / Updating
Upgrading/installing via (delete as applicable) : Web / Command Line

These errors are showing in the installer :

These errors are showing in the Mautic log :

These errors are showing in the upgrade_log.txt file (located in the root of your Mautic instance when an upgrade has been attempted - ensure you remove or redact any sensitive data such as domain names in the file path) :

Your problem
My problem is :

Steps I have tried to fix the problem :