Upgrade Help

[czcpf]

Hello,

I'm trying to upgrade 7.4.6 to 7.5.6. The upgrade is failing every time with the same message (see below). Can anyone assist?

php command.php upgrade

Current version is 7.4.6.

EspoCRM will be upgraded to version 7.5.6 now. Enter [Y] to continue.

Y

This may take a while. Do not close the terminal.

Downloading...

Upgrading...

Initialization...

Copying before upgrade files...

Rebuilding...

Before upgrade script execution...

Rebuilding...

Copying files...

Rebuilding...

Reverting...

Could not create PDOFactory.

[czcpf]

I think this may have been do to an incompatible extension.