Update.

src/app/app.py

@@ -1,10 +1,11 @@
 import argparse
+import asyncio
 import base64
 import json
 import pathlib
 import time
 import uuid
-import asyncio
+
 import aiohttp_jinja2
 import dataset
 import jinja2
@@ -162,8 +163,8 @@ class BaseApplication(RPCApplication):
 
 
 class WebDbApplication(BaseApplication):
-    
-    @property 
+
+    @property
     def loop(self):
         return asyncio.get_event_loop()
 
@@ -175,7 +176,9 @@ class WebDbApplication(BaseApplication):
     ):
         self.db_web = db_web
         self.db_path = db_path
-        self.db = db or dataset.connect(self.db_path)
+        self.db = db or dataset.connect(
+            self.db_path, engine_kwargs={"connect_args": {"check_same_thread": False}}
+        )
 
         super().__init__(*args, **kwargs)
         if not self.db_web:
@@ -249,7 +252,7 @@ class WebDbApplication(BaseApplication):
         return self.db["kv"].upsert({"key": key, "value": value}, ["key"])
 
     async def get(self, key, default=None):
-        return await self.run_in_executor(self.sget,key, default)
+        return await self.run_in_executor(self.sget, key, default)
 
     def sget(self, key, default=None):
         record = self.db["kv"].find_one(key=key)