Link and user name and No no errors showing on page from what I can see. I’ve uploaded so you can have a look.
http://betatesting.buysellipsc.com.au
user: test@test.com
pass: password123
On the ‘Current items listed’ you will see the edit button, click on that an you will see the issue.
Really can’t see what is causing it. password is at the top of this thread @Teodor