diff --git a/files/helpers/wrappers.py b/files/helpers/wrappers.py
index 6bd5672a8..4930c5301 100644
--- a/files/helpers/wrappers.py
+++ b/files/helpers/wrappers.py
@@ -9,6 +9,11 @@ import user_agents
 import time
 
 def calc_users(v):
+	# Some globals we expect aren't available when rendering error pages
+	if (not g or not hasattr(g, 'agent')
+			or not session or not ('session_id' in session)):
+		return ''
+
 	loggedin = cache.get(f'{SITE}_loggedin') or {}
 	loggedout = cache.get(f'{SITE}_loggedout') or {}
 	timestamp = int(time.time())
diff --git a/files/routes/comments.py b/files/routes/comments.py
index 0efbd291f..4465b82ee 100644
--- a/files/routes/comments.py
+++ b/files/routes/comments.py
@@ -255,7 +255,9 @@ def comment(v):
 	if parent.author.any_block_exists(v) and v.admin_level < PERMS['POST_COMMENT_MODERATION']:
 		abort(403, "You can't reply to users who have blocked you or users that you have blocked.")
 
-	is_bot = v.id != BBBB_ID and v.client or (SITE == 'pcmemes.net' and v.id == SNAPPY_ID)
+	is_bot = (v.client is not None
+		and v.id != BBBB_ID
+		or (SITE == 'pcmemes.net' and v.id == SNAPPY_ID))
 
 	execute_antispam_comment_check(body, v)
 
diff --git a/files/routes/posts.py b/files/routes/posts.py
index 15db20131..2f3fdadf0 100644
--- a/files/routes/posts.py
+++ b/files/routes/posts.py
@@ -877,8 +877,6 @@ def submit_post(v, sub=None):
 	
 	if embed and len(embed) > 1500: embed = None
 
-	is_bot = v.id != BBBB_ID and v.client or (SITE == 'pcmemes.net' and v.id == SNAPPY_ID)
-
 	if request.values.get("ghost") and v.coins >= 100:
 		v.charge_account('coins', 100)
 		ghost = True
@@ -894,7 +892,7 @@ def submit_post(v, sub=None):
 		over_18=bool(request.values.get("over_18","")),
 		new=bool(request.values.get("new","")),
 		app_id=v.client.application.id if v.client else None,
-		is_bot = is_bot,
+		is_bot=(v.client is not None),
 		url=url,
 		body=body,
 		body_html=body_html,
diff --git a/files/routes/users.py b/files/routes/users.py
index d2e5ec54e..c3869bf1a 100644
--- a/files/routes/users.py
+++ b/files/routes/users.py
@@ -913,7 +913,7 @@ def u_username_comments(username, v=None):
 
 	listing = get_comments(ids, v=v)
 
-	if v.client or request.path.endswith(".json"):
+	if (v and v.client) or request.path.endswith(".json"):
 		return {"data": [c.json for c in listing]}
 	
 	return render_template("userpage_comments.html", u=user, v=v, listing=listing, page=page, sort=sort, t=t,next_exists=next_exists, is_following=is_following, standalone=True)