deployR cannot open the connection

I have set up deployR on an Azure VM, and have logged in as the testuser which comes as default with the installation.

Upon running the ccFraudScore.R model, I get the following error:

> if(!exists('fraudModel')){load('fraudModel.rData')}
Console Error cannot open the connection
API Error cannot open the connection

I also get the same error on my own scripts when trying to load or read.csv data, either from the same folder as the script, or using the deployrExternal() function, with a file to read in the appropriate folder in here: C:\Program Files\Microsoft\DeployR-<version>\deployr\external.

I have set all the inbound Windows Firewall rules to "public" and enabled them, as described in the install documentation.

Please could anyone point me in the direction of where to look next?

Update

Thanks to @warmoverflow, I looked at the diagnostics and the app logs, and it appears everything is configured correctly, and the updated Microsoft installation guide.

If I log in to <IP Address>:<Port>/deployr/landing as administrator, then go to Administration Console > The Grid, I can edit the External directory configuration Storage Context, which by default is /deployr/external/data, as expected from the installation guide.

However, the problem persists.

Temporary Fix

As a temporary fix, I use a full file path to reference any other scripts or data files I need to use, and this works, as follows:

> if(!exists('fraudModel')){load('C:\\Program Files\\Microsoft\\DeployR-8.0.5\\deployr\\external\\repository\\testuser\\example-fraud-score\\fraudModel.rData')}

Note that I have not edited the above file path from installation.