arcpy.management.AddJoin(output_feature, "AccountPoi", lstfc1[x1-1], "AccountID", "KEEP_COMMON")

Traceback (most recent call last):
  File "C:/Users/dxc163530/PycharmProjects/start_charm.py", line 48, in <module>
    arcpy.management.AddJoin(output_feature, "AccountPoi", lstfc1[x1-1], "AccountID", "KEEP_COMMON")
  File "C:Program FilesArcGISProResourcesArcPyarcpymanagement.py", line 5096, in AddJoin
    raise e
  File "C:Program FilesArcGISProResourcesArcPyarcpymanagement.py", line 5093, in AddJoin
    retval = convertArcObjectToPythonObject(gp.AddJoin_management(*gp_fixargs((in_layer_or_view, in_field, join_table, join_field, join_type), True)))
  File "C:Program FilesArcGISProResourcesArcPyarcpygeoprocessing_base.py", line 506, in <lambda>
    return lambda *args: val(*gp_fixargs(args, True))
arcgisscripting.ExecuteError: Failed to execute. Parameters are not valid.
The value cannot be a feature class
ERROR 000840: The value is not a Raster Layer.
ERROR 000840: The value is not a Mosaic Layer.
WARNING 000970: The join field AccountPoi in the join table AccountPoints is not indexed. To improve performance, we recommend that an index be created for the join field in the join table.
Failed to execute (AddJoin).


Process finished with exit code 1