WebLogic Error 404-not found ternary expression

When you access a WebLogic page, an error occurs:

Error 404 -- not found
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.5 404 not found
The server has not found anything matching the request-Uri. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. the 410 (gone) Status Code shocould be used if the server knows, through some internally retriable mechanisms, that an old resource is permanently unavailable and has no forwarding address.
 

The error message indicates that the access path is incorrectly configured,

After searching for a long time, I found that the reason is that the three-element expression is used on the page.

$ {Item. payeebankno = 'null '? '': Item. payeebankno}

Change

<C: If test = "$ {item. payeebankno! = 'Null'} ">
$ {Item. payeebankno}
</C: If>

 

I don't know why WebLogic reports an error.