Microsoft Graph Search 400 error when searching - sharepoint

Question

I'm getting a 400 error when trying to do a search both through the Graph Explorer and through my own code. Both worked a few weeks ago but have stopped working recently. Another developer has been able to replicate it in their Tenancy, but Microsoft will not provide me support as we are not a Premier Customer.
If I run this query:
https://graph.microsoft.com/v1.0/drives{drive_id}/root/
it succeeds and returns information about the drive.
Following the documentation at https://learn.microsoft.com/en-us/graph/api/driveitem-search?view=graph-rest-1.0&tabs=http a search can be used via
https://graph.microsoft.com/v1.0/drives/{drive-id}/root/search(q='foobar')
But this returns a 400 error with "One of the provided arguments is not acceptable."
However, if I search for items in our entire Tenancy via the group search it succeeds so it doesn't appear to be a permissions error, but is not a viable solution as I need to search a particular drive.

Answer 1

please confirm whether you are still facing the issue. I was not able to reproduce the same from my side.
I ran this query:
https://graph.microsoft.com/v1.0/me/drives/drive-id/root/Search(q='Practices Checker')
And was able to get the desired result as below:
{
"#odata.context": "https://graph.microsoft.com/v1.0/$metadata#Collection(driveItem)",
"value": [
{
"#odata.type": "#microsoft.graph.driveItem",
"createdDateTime": "2020-12-09T11:55:47Z",
"id": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
"lastModifiedDateTime": "2020-11-03T06:51:27Z",
"name": "Practices Checker",
"webUrl": "https://microsoftapc-my.sharepoint.com/personal/ribera_xxxxxxxx_com/Documents/Documents/Practices%20Checker",
"size": 0,
"createdBy": {
"user": {
"email": "ribera#xxxxxxxxxx.com",
"displayName": "Rinki Bera"
}
},
"lastModifiedBy": {
"user": {
"email": "ribera#xxxxxxxxxx.com",
"displayName": "Rinki Bera"
}
},
...
]
}
Thank you.