Issues with bpy.context Python for blender

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Python

Hi, I have a recurring problem in blender with a python module I wrote. I have to take an existing object, make it active, then copy it's property into another object. It's been a pain in the ass since I tried to do so . For now the recurring error I get is :

Error: Python: Traceback (most recent call last):
  File "C:\Users\Alexandre\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\Nameplate_bender\nbe_op.py", line 692, in execute
    finish_dupliker(active_obj,params)
  File "C:\Users\Alexandre\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\Nameplate_bender\nbe_op.py", line 657, in finish_dupliker
    create_full_large_element(active_obj,nameplate_size,mirror_model,autoremesh,decimate_replace)
  File "C:\Users\Alexandre\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\Nameplate_bender\nbe_op.py", line 418, in create_full_large_element
    func_duplicateNfinish(active_obj,decimate_replace_active,mirror_model_active,autoremesh_active,element)
  File "C:\Users\Alexandre\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\Nameplate_bender\nbe_op.py", line 331, in func_duplicateNfinish
    new_obj = bpy.context.active_object.copy()
AttributeError: 'NoneType' object has no attribute 'copy'

location: <unknown location>:-1

the code that is causing the error is this one:

#duplicate_greeblie//used to make all the positioning and export// function that copy object, name it,move it, scale it, finish it
def func_duplicateNfinish(obj,decimate_replace,mirror_model,autoremesh,params):
    print_timestamp("func_duplicateNfinish")
    (nameplate_size,xvalue,yvalue,zvalue,xscale,yscale,zscale,xrotate,yrotate,zrotate,version,kind)=params
    active_obj=obj
    func_apply_transforms(active_obj)
    decimate_replace_active=decimate_replace
    mirror_model_active=mirror_model
    autoremesh_active=autoremesh
    func_activate_object(active_obj)
    #initiate it's coordinate to 0
    bpy.context.view_layer.objects.active = bpy.data.objects["Empty"]
    bpy.context.object.hide_set(False)
    if bpy.context.active_object is not None:
        #bpy.context.scene.cursor.location = bpy.context.active_object.location
        bpy.ops.view3d.snap_cursor_to_active()
        bpy.context.view_layer.objects.active = active_obj
    active_obj.select_set(True)
        
    new_obj = bpy.context.active_object.copy()
    bpy.context.collection.objects.link(new_obj)
    new_obj.data = new_obj.data.copy()
    bpy.ops.object.select_all(action='DESELECT')
    bpy.context.view_layer.objects.active = bpy.data.objects[new_obj.name]

    #new_obj=bpy.context.view_layer.objects.active
    new_obj.name= nameplate_size + "_" + kind + "_" + obj.name + "_style_" + version

    bpy.ops.object.origin_set(type='ORIGIN_CURSOR', center='MEDIAN')
    #move the object to the new coordinates and rescale
    bpy.context.object.location[0] = float(xvalue)
    bpy.context.object.location[1] = float(yvalue)
    bpy.context.object.location[2] = float(zvalue)
    bpy.context.object.scale[0] = float(xscale)
    bpy.context.object.scale[1] = float(yscale)
    bpy.context.object.scale[2] = float(zscale)
    bpy.context.object.rotation_euler[0] = float(xrotate)
    bpy.context.object.rotation_euler[1] = float(yrotate)
    bpy.context.object.rotation_euler[2] = float(zrotate)


    params= (nameplate_size,True,True,mirror_model_active,True,autoremesh_active,True,True,True,True,decimate_replace_active,True)
    #transformation et export final du greeblie
    finish_greeblie(new_obj,params)
    bpy.ops.object.select_all(action='DESELECT')

and the part that is really annoying, causing the error is this :

active_obj.select_set(True)

new_obj = bpy.context.active_object.copy()

Any idea on how to pass all parameters of an object to a new one? and how to desactivate this error?

What I have tried:

I have tried running this script many times. It fails for reason I don't understand, and sometimes it runs, and I still don't understand why. I feel like I'm turning around, and I don't know how to solve it.