500 error trying to save SSL certificate?

I'm trying to add a LetsEncrypt certificate to my hub (C7 running 2.4.0.151) but every time I attempt to save the certificate, I get a blank page with a 500 response. I've tried just the cert and key, I've tried cert+chain and key, it just seems like whatever I put in barfs a 500. The rest of the hub works fine still, so this isn't the issue some others have encountered after adding a certificate.

I see @jlvillal posted something about this and then deleted it—did you perhaps find out what the problem was?

My issue occurred when I was working on developing GitHub - JohnVillalovos/hubitat-ssl-certificate: Simple Python program to update the SSL certificate on a Hubitat device and made a mistake.

I restored from a backup and then things went back to normal. And then I got my code working correctly.

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