I have seen similar posts, but Purchase History seems to be loading for me.
Try another browser to see if that makes a difference for you.
You should also be able to see your orders on your Summary page, if the problem is with the Purchase History page itself.
If none of that helps, you should be able to see your purchases by going to your Purchase History page on another site such as ebay.co.uk, ebay.ca or ebay.com.au.
If you have a browser or the eBay app on your phone, you could try that as well.
