Error 3075 in Setting Subform Filter and Error 3464 in Setting Subform Filter

I have created an Access 2016 database for work. I have two combo boxes on the parent form to filter the records on the subform.   I have used the following code for each combo box and I get two different errors.  One combo box is for Application Name and the other combo box contains the version.

Private Sub cboApplication_AfterUpdate()

On Error GoTo Proc_Error
If IsNull(Me.cboApplication) Then
   Me.sfrmRFPQuestions.Form.Filter = ""
   Me.sfrmRFPQuestions.Form.FilterOn = False
Else
  Me.sfrmRFPQuestions.Form.Filter = "[Application Name]=" & Me.cboApplication
  Me.sfrmRFPQuestions.Form.FilterOn = True
End If
Proc_Exit:
   Exit Sub
Proc_Error:
   MsgBox "Error " & Err.Number & " in setting subform filter:" & vbCrLf & Err.Description
   Resume Proc_Exit
End Sub

Private Sub cboVersion_AfterUpdate()

On Error GoTo Proc_Error
If IsNull(Me.cboVersion) Then
   Me.sfrmRFPQuestions.Form.Filter = ""
   Me.sfrmRFPQuestions.Form.FilterOn = False
Else
  Me.sfrmRFPQuestions.Form.Filter = "[Version]=" & Me.cboVersion
  Me.sfrmRFPQuestions.Form.FilterOn = True
End If
Proc_Exit:
   Exit Sub
Proc_Error:
   MsgBox "Error " & Err.Number & " in setting subform filter:" & vbCrLf & Err.Description
   Resume Proc_Exit
End Sub


I am getting very frustrated with this error.