Get error when using $filter and $expand in postman

Question

I am having two entitities in SAP BYD :

Account * Account_id

• Value
• Company

Company * Company_id

• Date

Account has a 1:n association to Company this is a example url i used:

/sap/opu/odata/sap/xxxxx/Account?$expand=Bar &$filter=Date gt datetime'2023-12-31T23:59:59'

but I got error:

"Left hand expression of memberaccess operator has wrong cardinality (to many not allowed)"

I don't know why and what is the solution for this error, please help me.

I try to query odata in sap byd using $expand and $filter but I got this error:

"Left hand expression of memberaccess operator has wrong cardinality (to many not allowed)"

I hope to find a reason why this happen and solution to fix it