rabbitmq-server: 3.12.0 is not compatible with Erlang 25.x
Similar problem: #12735 (closed)
Despite that the matrix compatibility of RMQ v3.12 describe the erlang 25 as the minimum supported version https://www.rabbitmq.com/which-erlang.html
there are some pre-defined modules that fail with Erlang v25, for instance, credentials_obfuscation_svc
beam/beam_load.c(184): Error loading module credentials_obfuscation_svc:
This BEAM file was compiled for a later version of the runtime system than the current (Erlang/OTP 25).
To fix this, please re-compile this module with an Erlang/OTP 25 compiler.
(Use of opcode 181; this emulator supports only up to 180.)
I suppose the solution should be to upgrade the Erlang version on that the rabbitmq-server
depends.
Temporal Workaround
Install the Erlang v26 from the community edge branch apk add --repository=https://dl-cdn.alpinelinux.org/alpine/edge/community erlang