Custom PHP Page URLs now go to WP Pages

Hello,

I recently upgraded the ‘WP Offload Media’ Lite plugin.

Immediately afterwards, the custom PHP pages on my WP install stopped working and returned errors, beginning with:

Fatal error: Uncaught Error: Call to undefined method AS3CF_S3_To_Local::get_attachment_id_from_url()

I searched it and found there was maybe a clash with WP Offload and the Divi theme.

https://www.ads-software.com/support/topic/uncaught-error-call-to-undefined-method-as3cf_s3_to_localget_attachment_id_fr/

When I deactivated the plugin, the custom PHP pages displayed correctly again, but the images were missing because they are connected via the plugin to my Amazon account.

I tried the fixes suggested, including upgrading the plugin to pro, but each time I activated the plugin, I got the error again.

But now, with the plugin deactivated and the errors have gone, when I try to visit any of my custom php pages, they take me to a WP page instead. The URL/path is the same, but they no longer go to the custom pages which are still in the same place on my server.

EG: this page used to display a custom PHP page, with my email newsletter content, but now simply returns a WP Page with the name ‘daily newsletter’:

https://website.com/daily-newsletter/

I tried resaving my permalinks ( site.com//%postname%/ ) in case that was part of the issue, but no change.

Do you have any ideas what might be causing this?

Thanks