I have a small webapp that runs locally with a local MongoDB database just fine. I moved it to Render, and created a DB cluster on mongoDB atlas, and the webapp appears to build on render, but every time I start the webapp on Render, it says it can’t connect with MongoDB.
@Daniel_Winterbottom I just ran into a similar problem (connecting Mongo Atlas to render web service). I had a slightly more vague error, but my issue was resolved by adding my render project’s outbound IP addresses to mongodb project’s network access.
On render.com web service main page, click the Connect button in top right. Select the Outbound tab. Copy these IPs
On your mongo project Atlas page, click Network access. Add the IPs
Posting on the off chance that this is helpful. I had found this guide, but had already been following those steps to no avail.