When we try to create a meeting from Odoo Calendar, the following error showing..

Error:
Odoo Server Error

Traceback (most recent call last):
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 656, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 314, in _handle_exception
raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\tools\pycompat.py", line 87, in reraise
raise value
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 698, in dispatch
result = self._call_function(**self.params)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 346, in _call_function
return checked_call(self.db, *args, **kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\service\model.py", line 97, in wrapper
return f(dbname, *args, **kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 339, in checked_call
result = self.endpoint(*a, **kw)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 941, in __call__
return self.method(*args, **kw)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\http.py", line 519, in response_wrap
response = f(*args, **kw)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\web\controllers\main.py", line 962, in call_kw
return self._call_kw(model, method, args, kwargs)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\web\controllers\main.py", line 954, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\api.py", line 755, in call_kw
return _call_kw_model(method, model, args, kwargs)
File "C:\Program Files (x86)\Odoo 12.0\server\odoo\api.py", line 728, in _call_kw_model
result = method(recs, *args, **kwargs)
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\user_recent_log\models\user_log.py", line 43, in get_recent_log
fields_data = record.sudo().read(changes.keys())[0]
File "c:\program files (x86)\odoo 12.0\server\odoo\addons\calendar\models\calendar.py", line 1658, in read
fields2 = fields and fields[:]
TypeError: 'dict_keys' object is not subscriptable

NOTE: I have implemented some custom fields like Meeting Organizer, and two different html type fields. And also did a print format from the same model (calendar.event) itself.

Please help me out to solve this issue.