Direct access to some oracle details cause error

[janmichek]

Context information

application version: development
device: Laptop
browser: Firefox 111
operating system: Win 11

Steps to reproduce

firefox_l1lu7VCU0v.mp4

https://github.com/aeternity/aescan/assets/15363559/647de1c1-6c98-40e7-ba91-bb7252078b24
https://aescan.dev.aepps.com/oracles/ok_N7nzuDXwFHJtWKvVnV4AQtzZmUFSFvXFf79GsNdrA7XMEYxqi

What is expected?

Going to oracle detail. Some are working, some not

What is actually happening?

error 500

[janmichek]

So apparently its about unsanitized Creator value.
Is it correct that Creator does not have to be set?
Should we display ---, N/A or some other value in that case?

firefox_P4GjR2C2PL.mp4

[michele-franchi]

We use --- to display a placeholder for loading so I would suggest N/A, what do you think?

[janmichek]

Agree, will do