VBA User Form Initialization Object Required - excel

Question

Something strange is happening where I call a userform to show via a module, but it says object is required and does not initialize the form. The strange part is the method of calling does not change from a workbook that functions the exact same.
I have a module with the following code assigned to a button:
Sub SHOW_INSERT_TASK_FORM()
INSERT_TASK_FORM.Show ' Error Occurs here
End Sub
This should initialize the "INSERT_TASK_FORM" user form and run its code but I receive an object required error upon the "Show" method.
Here is the code imbedded within the user form:
Private Sub SUBMIT_BUTTON_Click()
Unload Me
End Sub
Private Sub UserForm_Initialize()
'DECLARE OBJECT VARIABLES
Dim planner_ws As Worksheet, data_ws As Worksheet
Dim departments As ListObject
Dim types As ListObject
Dim tasks As ListObject
Dim dep_arr() As Variant
Dim type_arr() As Variant
Dim task_arr() As Variant
Dim i As Double, j As Double, x As Double
Dim lrow As Double, srow As Double
'SET WS VARIABLES
Set planner_ws = ThisWorkbook.Worksheets("TASK_PLANNER")
Set data_ws = ThisWorkbook.Worksheets("DATA")
'ASSIGN OBJECT VARIABLES
Set departments = data_ws.ListObjects("DEPARTMENT_TABLE")
Set types = data_ws.ListObjects("TASK_TYPE_TABLE")
Set tasks = data_ws.ListObjects("TASKS_TABLE")
'ASSIGN VARIABLE VALUES
dep_arr = departments.DataBodyRange
type_arr = types.DataBodyRange
task_arr = tasks.DataBodyRange
lrow = planner_ws.Cells(planner_ws.Rows.Count, 2).End(xlUp).Row
'INITIAL USER FORM VALUES
TASK_NAME_TBOX.Value = ""
DESC_TBOX.Value = ""
SDATE_TBOX.Value = ""
EDATE_TBOX.Value = ""
Task_Option = False
Sub_Option = False
'POPULATE COMBO BOXES
With TYPE_CBOX
For i = LBound(type_arr) To UBound(type_arr)
.AddItem type_arr(i, types.ListColumns("Task_Type").Index)
Next i
End With
With DEP_CBOX
For i = LBound(dep_arr) To UBound(dep_arr)
.AddItem dep_arr(i, types.ListColumns("Department").Index)
Next i
End With
With TASK_CBOX
For i = LBound(task_arr) To UBound(task_arr)
.AddItem task_arr(i, types.ListColumns("Task Name").Index)
Next i
End With
End Sub
Private Sub SUB_OPTION_Click()
If Sub_Option.Value = True Then
Task_Label.Visible = True
TASK_CBOX.Visible = True
Else
Task_Label.Visible = False
TASK_CBOX.Visible = False
End If
End Sub
For reference, the following code in another workbook of mine works just fine:
Sub GameSale_Form()
xInput_GameSale.Show
End Sub
Private Sub UserForm_Initialize()
LCS_Option = False
NOTLCS_Option = False
Qty_TextBox.Value = ""
Discount_TextBox.Value = ""
InputCost_Textbox.Value = ""
InRegion_Option.Value = False
NotInRegion_Option = False
New_Option.Value = False
Used_Option.Value = False
InputCost_Option = False
AvCost_Option = False
FDAPricing_Option = False
NoFDAPricing_Option = False
With Cabinet_Combobox
For i = 2 To ThisWorkbook.Worksheets("List_Data").Cells(Rows.Count, 36).End(xlUp).Row
.AddItem ThisWorkbook.Worksheets("List_Data").Cells(i, 36).Value
Next i
End With
Opening_Textbox.Value = ""
Ambition_Textbox.Value = ""
Goal_Textbox.Value = ""
WalkAway_Textbox.Value = ""
Qty_SpinButton.Min = 0
Qty_SpinButton.Max = 1000
End Sub