During this:

    box = await Box.create(web3Provider);

an exception is thrown (and not caught):

generating 2048-bit RSA keypair...
Uncaught (in promise)
cause: undefined
message: "The user denied permission to access the database."
name: "OpenError"
stack: "OpenError: The user denied permission to access the database.↵

spaceName is "DAOstack"
Using [email protected]
The web3provider is pointing at rinkeby.

You can reproduce here: https://alchemy-add3boxcomments-jjgmo6.herokuapp.com/

STEPS:

1. in the upper-right, login to an account (I'm using metamask)
2. hover your mouse over the account address or name and in the dropdown, click "Full Profile"
3. edit and submit the profile.

RESULT:
The exception