Issue about Backend error. 400 Bad Request

Hi.

Thank you for answering my questions so far

This time, the following error continues to occur.

I also looked at the questions that other people
posted on the forum

1. Check for a new version of Eikon
2. Sent too many requests.

Is that right? what I understand?

At this point in time when I posted the
question, I didn't call the api often.

I am writing on the forum because it seems to be a
different problem from the previous call limit of 10000.

In addition, get_history works properly.

Only Get_data is not working.

I'll ask you about what I've tested + what I'm
curious about.

Recently, our company had a server inspection,
so we rebooted the PC which refinitive is installed.

Does this have an effect?

Just in case, I created a new app_key and changed
it, and the error disappeared.

So is this error related to app_key?

If so, restrictions on app_key? Is there an
expiration date?