Search shared folder suddenly doesn't work

I have a Team Account and have a shared folder "/for ut (1)" form other account.
I have been using the following API to search .csv files under "/for ut (1)" until today 2023-02-1 it suddenly returned empty, has the Dropbox API been updated recently and what can I do to complete the search? I'm sure my share link is working.

{
url: 'https://api.dropboxapi.com/2/files/search_v2',
config: {
headers: {
Authorization: 'Bearer XXX',
'Content-Type': 'application/json'
},
method: 'POST'
},

postData: '{"query":"csv","options":{"file_extensions":["csv"],"path":"/for ut (1)","filename_only":true}}'

}

response:
{
"has_more": false,
"matches": []
}