diff --git a/instaloader/__init__.py b/instaloader/__init__.py
index b250340..a5be26e 100644
--- a/instaloader/__init__.py
+++ b/instaloader/__init__.py
@@ -1,7 +1,7 @@
 """Download pictures (or videos) along with their captions and other metadata from Instagram."""
 
 
-__version__ = '4.9'
+__version__ = '4.9.1'
 
 
 try:
diff --git a/instaloader/instaloader.py b/instaloader/instaloader.py
index 31f8c90..950e6ce 100644
--- a/instaloader/instaloader.py
+++ b/instaloader/instaloader.py
@@ -1334,6 +1334,10 @@ class Instaloader:
                                                                                                   profile_id))
                 profile_from_id = Profile.from_id(self.context, profile_id)
                 newname = profile_from_id.username
+                if profile_name == newname:
+                    self.context.error(
+                        f"Warning: Profile {profile_name} could not be retrieved by its name, but by its ID.")
+                    return profile_from_id
                 self.context.error("Profile {0} has changed its name to {1}.".format(profile_name, newname))
                 if latest_stamps is None:
                     if ((format_string_contains_key(self.dirname_pattern, 'profile') or
diff --git a/instaloader/structures.py b/instaloader/structures.py
index 52b56fd..ba16b0a 100644
--- a/instaloader/structures.py
+++ b/instaloader/structures.py
@@ -764,13 +764,19 @@ class Profile:
     def _obtain_metadata(self):
         try:
             if not self._has_full_metadata:
-                metadata = self._context.get_json('{}/feed/'.format(self.username), params={})
-                self._node = metadata['entry_data']['ProfilePage'][0]['graphql']['user']
+                metadata = self._context.get_iphone_json(f'api/v1/users/web_profile_info/?username={self.username}',
+                                                         params={})
+                if metadata['data']['user'] is None:
+                    raise ProfileNotExistsException('Profile {} does not exist.'.format(self.username))
+                self._node = metadata['data']['user']
                 self._has_full_metadata = True
         except (QueryReturnedNotFoundException, KeyError) as err:
             top_search_results = TopSearchResults(self._context, self.username)
             similar_profiles = [profile.username for profile in top_search_results.get_profiles()]
             if similar_profiles:
+                if self.username in similar_profiles:
+                    raise ProfileNotExistsException(
+                        f"Profile {self.username} seems to exist, but could not be loaded.") from err
                 raise ProfileNotExistsException('Profile {} does not exist.\nThe most similar profile{}: {}.'
                                                 .format(self.username,
                                                         's are' if len(similar_profiles) > 1 else ' is',