Please open the helpers.php file from app/ directory, you will see a function called currencies or something like that, or search by currency, change there.
Can you please provide us a test server at least, so we can check the issue, I’m sure, there is no issue from our application. It should open a view page without any issue.
This is weird things happening and never saw this before.
However, to check properly, please provide us your Website cPanel info to log in your hosting and check.
Don’t forget to make the private reply if you post hosting info here.
Thank you for placing your question, your last request is about a feature customization, and we (Support team) unable to provide any customization suggestion (Core code customization). And we really sorry about that.
Thank you for your understanding about this matters.