Help with export button (exporting fbx)

Question

Im in need of some python help or someone with more knowlage with python, tryn to update an old 2.7 scrip to 2.8 and so far so good until clicking on export button. i get this error when using a relative path and the same using a custom path but on line 1638

NameError: name 'FBX_Export_Actions' is not defined , line 1636, in execute

This is the error lines within my class

#FBX Export button  
class FBXEXPORT_OT_button(bpy.types.Operator):
    """Button for Fbx Export"""
    bl_idname = "ue.export_fbx_button"
    bl_label = "ExportFbxButton"
def execute (self, context):   

    ActualPath = dirname(bpy.data.filepath) 

    if FBXRelativeFolderSelector == True:            
        if ActualPath == "":
            self.report({'ERROR'}, "You need Save the file for use save automatically into a relative folder")
        else:
            FBX_Export_actions(self,context) #this is line 1636
    else:
        FBX_Export_actions(self,context)     #this is line 1638  


    #print("test OK")
    return {'FINISHED'}

I can see the problem is within FBX_Export_Actions (maybe not being defined right?)

    #Init button  
class INITUETOOLS_OT_button(bpy.types.Operator): #InitUEToolsButton
    """Init Main Properties"""
    bl_idname = "ue.init_button"
    bl_label = "InitButton"
def execute (self, context):       

    Main_UI_Properties(bpy.context.scene)
    SetObjScale(bpy.context.scene)
    Rename_Properties(bpy.context.scene)
    FBX_Export_Properties(bpy.context.scene)
    Animation_UI_Properties(bpy.context.scene)


    global Init
    Init = True        

    return {'FINISHED'}   

#FBX Export Actions

def FBX_Export_actions(self,context):

    if FBX_PivotToCenter == True:                  

        global FBX_name_multi


        scn = context.scene 

        sufix = 0

        #Create group

        group = "exportgroup"

        if group in bpy.data.collections:
            print ("Group already created")
        else:
            bpy.ops.collections.create(name="exportgroup")        

        ActionGroup = bpy.data.collections["exportgroup"]

        bpy.ops.object.select_all(action='DESELECT') 

        Get_Custom_ExportName("String:   ", 'FBX_Custom_Export_Path', scn)


        #Group Operation

        for ob in ActionGroup.objects:

            print(ob.name) 

            ob.select = True
            bpy.context.scene.objects.active = ob
            bpy.context.view_layer.objects.active = ob

            if FBXBaseNameSelector == "Object":
                FBX_name_multi = ob.name
            if FBXBaseNameSelector == "Custom":
                FBX_name_multi = FBX_CustomExportName + "_" + str(sufix)

            #Store initial position
            obStartPosX = ob.location[0]
            obStartPosY = ob.location[1]
            obStartPosZ = ob.location[2]

            if FBX_ExportCollision == False:
                print("Collision Not Exported")
            if FBX_ExportCollision == True:
                FBX_SelectCollsionObjects (self,context)  


            #move object to center
            bpy.ops.view3d.snap_cursor_to_center(false)
            bpy.ops.view3d.snap_selected_to_cursor(use_offset=False)
            ob.location = (0,0,0) 

            #Export                
            FBX_Export(self,context)

            #Move to initial position
            ob.location = (obStartPosX,obStartPosY,obStartPosZ)
            bpy.ops.view3d.snap_cursor_to_active()
            bpy.ops.view3d.snap_selected_to_cursor(use_offset=False)               

            ob.select = False

            if FBX_ExportCollision == False:
                print("Collision Not Exported")
            if FBX_ExportCollision == True:
                FBX_SelectCollsionObjects (self,context)
                bpy.ops.object.select_all(action='DESELECT')
                #FBX_Make_Only_selectedObjLayer_visible (self,context)               

            sufix = sufix +1           

        bpy.data.collections["exportgroup"].user_clear()        
        bpy.data.collections.remove(bpy.data.collections["exportgroup"])       


        #print("pivotOK")

    if FBX_PivotToCenter == False:
        FBX_Export(self,context)
        print("Export normally")  

It would be a great help if anyone could take a look over this code and help to pinpoint this error.