@alex Getting compilation issues again.

09:57:40.061 [error] beam/beam_load.c(1879): Error loading module prometheus_htt p:
This BEAM file was compiled for a later version of the run-time system than 23 .
To fix this, please recompile this module with an 23 compiler.
(Use of opcode 178; this emulator supports only up to 170.)

In the comments of your code snippets, someone recommends deleting the _build directory and then trying it again. Should I try that?