# Neo4j Connection Error: Build an Neo4j-backed Chatbot

**URL:** <https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001>\
**Category:** GenAI\
**Created:** [November 17, 2023, 4:56pm UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001 "2023-11-17T16:56:51Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![dario.fabiani96](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/dario.fabiani96/32/30076_2.png) [@dario.fabiani96](https://community.neo4j.com/u/dario.fabiani96)\
**Post date:** [November 17, 2023, 4:56pm UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/1 "2023-11-17T16:56:51Z")

</div>

Hi there,  
I am taking the course "Build an Neo4j-backed Chatbot..". I have forked the repo and developing on my own IDE (VScode).  
Everything good except when I follow the "Neo4j Retriever Tool".

It keeps giving me an error regarding the connection to the Neo4j Server.

in my .toml file i have pasted the code found in "Connecting to Neo4j". So I have:

NEO4J\_URI = "neo4j+s://82f3237db9dd8250face9188eb40a0cb.neo4jsandbox.com:7687"  
NEO4J\_USERNAME = "neo4j"  
NEO4J\_PASSWORD = "coordinations-frame-defect"

and ofc I also have the api\_key and openai mode.

When i launch streamlit it returns me this error:

 ![image](https://us1.discourse-cdn.com/flex021/uploads/neo4jcommunity/original/3X/2/5/25ac9cd8affb64116bafd9755cd4e84d85b0da5d.png)

It seems that I cannot reach the Neo4j server.

* * *

I followed the guide entirely, except for the part of creating the vector.py. In the page it says to create the file in the folder "solutions/tool", but i guess there is where the solution for the step is in, thus i created the file in mail folder by copying the solution.

I also tried this code to check the connection:

```python
from langchain.graphs import Neo4jGraph

graph = Neo4jGraph(
    url="neo4j+s://82f3237db9dd8250face9188eb40a0cb.neo4jsandbox.com:7687",
    username="neo4j",
    password="coordinations-frame-defect"
)

r = graph.query("MATCH (m:Movie{title: 'Toy Story'}) RETURN m")
print(r)

```

But it returns me the error:

```auto
"name": "ValueError",
	"message": "Could not connect to Neo4j database. Please ensure that the url is correct",

```

is it a problem with the neo4j server?

---

<div class="post-metadata">

**Author:** ![glilienfield](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/glilienfield/32/27534_2.png) [@glilienfield](https://community.neo4j.com/u/glilienfield)\
**Post date:** [November 17, 2023, 6:52pm UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/2 "2023-11-17T18:52:01Z")

</div>

Maybe try neo4j or bolt as the protocol type instead of neo4j+s.

---

<div class="post-metadata">

**Author:** ![dario.fabiani96](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/dario.fabiani96/32/30076_2.png) [@dario.fabiani96](https://community.neo4j.com/u/dario.fabiani96)\
**Post date:** [November 20, 2023, 9:24am UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/3 "2023-11-20T09:24:24Z")

</div>

Hi Gary,

Thank you for your suggestion. I've now replaced the URL with that of my sandbox. This detail wasn't specified in the course materials, so I had initially retained the one indicated there.

---

<div class="post-metadata">

**Author:** ![dt.olivier](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/dt.olivier/32/23127_2.png) [@dt.olivier](https://community.neo4j.com/u/dt.olivier)\
**Post date:** [January 14, 2024, 10:17am UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/4 "2024-01-14T10:17:35Z")

</div>

Got same issue, tried all protocols while credentials are ok etc... ex: work fine for example using llamaIndex.

---

<div class="post-metadata">

**Author:** ![sofia.morgado](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/sofia.morgado/32/30909_2.png) [@sofia.morgado](https://community.neo4j.com/u/sofia.morgado)\
**Post date:** [February 21, 2024, 11:06am UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/5 "2024-02-21T11:06:27Z")

</div>

Hi! I have exactly the same problem, did you find a solution?

---

<div class="post-metadata">

**Author:** ![asmaahadir11](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/asmaahadir11/32/30820_2.png) [@asmaahadir11](https://community.neo4j.com/u/asmaahadir11)\
**Post date:** [February 23, 2024, 9:18am UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/6 "2024-02-23T09:18:22Z")

</div>

@glilienfield Hi Gary - facing the same issue. Do you mind pointing me to what the sandbox URL/correct URL should look like? I've tried bolt and neo4j as protocol and nothing works.

---

<div class="post-metadata">

**Author:** ![dario.fabiani96](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/dario.fabiani96/32/30076_2.png) [@dario.fabiani96](https://community.neo4j.com/u/dario.fabiani96)\
**Post date:** [February 23, 2024, 10:21am UTC](https://community.neo4j.com/t/neo4j-connection-error-build-an-neo4j-backed-chatbot/65001/7 "2024-02-23T10:21:33Z")

</div>

Hi,

I resolved the issue by inputting the URL of my sandbox.

This is what the input looks like:

```auto
NEO4J_URI = "bolt://44.214.105.48"
NEO4J_USERNAME = "neo4j"
NEO4J_PASSWORD = "methodology-fasteners-analog"

```