Try setting the HANA Instance's "Allowed connections" option to "Allow all IP addresses" allowall.png. This solved the issue for me but I have to figure out why the "Deny all IP addresses (except Business Technology Platform)" option was throwing an ...

I am having a similar issue as well. Subscription fails with srv app giving the logs simlar to the original question."c.s.c.m.s.SubscriberSidecarImpl : Sidecar returned http status 500"and"Failed to process subscription of tenant '2995b828-ddff-4d9f-...