Error while creating new Slide Show

Traceback (most recent call last):
  File "/home/frappe/frappe-bench/apps/frappe/frappe/desk/form/save.py", line 22, in savedocs
    doc.save()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 260, in save
    return self._save(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 283, in _save
    self.insert()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 222, in insert
    self.run_before_save_methods()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 869, in run_before_save_methods
    self.run_method("validate")
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 765, in run_method
    out = Document.hook(fn)(self, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1040, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1023, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 759, in <lambda>
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/website/doctype/website_slideshow/website_slideshow.py", line 14, in validate
    self.validate_images()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/website/doctype/website_slideshow/website_slideshow.py", line 25, in validate_images
    result = frappe.get_all("File", filters={ "file_url":("in", files) }, fields="is_private")
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1180, in get_all
    return get_list(doctype, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1153, in get_list
    return frappe.model.db_query.DatabaseQuery(doctype).execute(None, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 87, in execute
    result = self.build_and_run()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 99, in build_and_run
    args = self.prepare_args()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 118, in prepare_args
    self.build_conditions()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 280, in build_conditions
    self.build_filter_conditions(self.filters, self.conditions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 301, in build_filter_conditions
    conditions.append(self.prepare_filter_condition(f))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 327, in prepare_filter_condition
    values = values.split(",")
AttributeError: 'map' object has no attribute 'split'

Traceback (most recent call last):
  File "/home/frappe/frappe-bench/apps/frappe/frappe/app.py", line 62, in application
    response = frappe.handler.handle()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 22, in handle
    data = execute_cmd(cmd)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/handler.py", line 53, in execute_cmd
    return frappe.call(method, **frappe.form_dict)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 942, in call
    return fn(*args, **newargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/desk/form/save.py", line 22, in savedocs
    doc.save()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 260, in save
    return self._save(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 283, in _save
    self.insert()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 222, in insert
    self.run_before_save_methods()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 869, in run_before_save_methods
    self.run_method("validate")
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 765, in run_method
    out = Document.hook(fn)(self, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1040, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1023, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 759, in <lambda>
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/website/doctype/website_slideshow/website_slideshow.py", line 14, in validate
    self.validate_images()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/website/doctype/website_slideshow/website_slideshow.py", line 25, in validate_images
    result = frappe.get_all("File", filters={ "file_url":("in", files) }, fields="is_private")
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1180, in get_all
    return get_list(doctype, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 1153, in get_list
    return frappe.model.db_query.DatabaseQuery(doctype).execute(None, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 87, in execute
    result = self.build_and_run()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 99, in build_and_run
    args = self.prepare_args()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 118, in prepare_args
    self.build_conditions()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 280, in build_conditions
    self.build_filter_conditions(self.filters, self.conditions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 301, in build_filter_conditions
    conditions.append(self.prepare_filter_condition(f))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/db_query.py", line 327, in prepare_filter_condition
    values = values.split(",")
AttributeError: 'map' object has no attribute 'split'

Hello,
Did you get to fix this?
Same issue here. Exactly the same error message.

Thanks.

No. I am still looking for solution