Jack,
I had the same problem. I disabled my cache plugins, clicked the button, and it worked.
Try disabling some plugins, esp. cache plugins, and click to update. Then reactivate your plugins.
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This reply was modified 6 years, 6 months ago by kingneb.
Both.
In general, i have paypal as default and only option. Test mode is off. Email is correct.
When i create a new invoice, i simply select “Paypal” and those settings carry over.
I’ve been using it this way for months and it has worked fine. When i updated to 3.09.4 this morning, it wants to take all invoices to sandbox, including any new ones i create.
A developer ran into the same problem with one of his clients and gave me a temp. fix: https://usabilitydynamics.com/products/wp-invoice/forum/topic/update-version-3-09-4-is-stuck-in-sandbox-mode/
