Return page is not working

Hi,
I’m having problems getting the return page to work properly.
I have a return page set for a membership plugin within Paypal – so I don’t know if that is interfering.

theawakeningcenters.org. (button is on this page, also in a widget on the sidebar of fundraising page)

I have tried the different methods of return page – and I get the variables added which is causing a 404 error. If I remove the return address, it is taking me to a page that is not able to be seen by non-members and causes an error.. it is not going to the home page.

Nothing is working..

Thanks for any help.

Evely

https://www.ads-software.com/plugins/paypal-donations/