New 503 error that I can't figure out

I have mautic running on an AWS ec2 instance and everything had been fine for awhile, but now I get a 503 error:



This page isn’t working

mautic.thankster.com is currently unable to handle this request.

HTTP ERROR 503



I’m not super technical in this regard, so would appreciate any thoughts or insights…



Thanks.

I have mautic running on an AWS ec2 instance and everything had been fine for awhile, but now I get a 503 error:

This page isn’t working
mautic.thankster.com is currently unable to handle this request.
HTTP ERROR 503

I’m not super technical in this regard, so would appreciate any thoughts or insights…

Thanks.

I get a login page, not a HTTP ERROR 503.