Webhook fails delivery every time

The plugin works great in that all payments etc work straight out of the box. What I can’t get to work is the webhook – every event delivery fails. Every time it’s the same error:

Response body
Invalid encoding: ISO-8859-1

I have tried:

– Disabling all plugins except for this Stripe plugin and woocommerce
– Using default woocommerce storefront theme.
– Remove webhook and set up manually (after initially using the plugin’s automatic webhook creation method)
– Roll/change webhook secret & double check it’s correct in both plugin settings and Stripe dashboard
– Reactivate wordfence security plugin and whitelist stripe webhook IPs
– Switch to test mode and send test events from Stripe

Any ideas? I know webhooks aren’t vital for our purpose but we are running subscriptions so concerned we might miss something important without this working.

Thanks, Rhys

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