Database connection ENOTFOUND

Hi there.

Getting this error on digitalocean connecting with managed database:

{"status":"500","code":"ENOTFOUND","message":"getaddrinfo ENOTFOUND db","stack":"Error: getaddrinfo ENOTFOUND db\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:71:26)"}

In wappler I can connect with the database manager without a problem.

I tried to re-deploy, shutdown and clear all services + deploy etc but still same problem.
The connection was working before. Anyone any idea what the problem might be?