Web app stopped to show glucose data

[nicola-iuretigh]

Describe the bug
Hi.
I have my Nightscout web app (v. 14.2.6) running on Railway and I'm using xDrip+ to upload data on the web app.
Six days ago the web app misteriously stopped to show values on the graph.
I had made no changes to the web app, nor to the hosting configuration, no restarts, nothing at all...
On the xDrip+ as well I hadn't made any changes.
xDrip+ logs some strange messages that currently I'm not able to understand; the messages are these:

"Got exception attempting status update: javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found"

"Unable to do REST API Upload: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. marking record: failed"

I have restarted the web app and the xDrip+ device, but nothing has changed.
My suspect is that something has changed on the hosting side (Railway) but I have no clue on what it can be and what to do to restore the correct behaviour for the web app.

Can you help me, please?

If this is not the correct place for this kind of problems I beg your pardon.

Your setup information

• Version of Nightscout 14.2.6
• Uploading data with xDrip+