The self-hosted runner: ci_i-0fd8d0241207f9b67 lost communication with the server. Verify the machine is running and has a healthy network connection. Anything in your workflow that terminates the runner process, starves it for CPU/Memory, or blocks its network access can cause this error.

buildx failed with: ERROR: failed to solve: process "/bin/sh -c /get-zsh.sh && /get-otp.sh ${OTP_VERSION} && /get-elixir.sh ${ELIXIR_VERSION} && env FDB_VERSION=${FDB_VERSION} /get-fdb.sh && env EMQTT_BENCH_REF=${EMQTT_BENCH_REF} /get-emqtt-bench.sh && env LUX_REF=${LUX_REF} /get-lux.sh && rm /get-otp.sh /get-zsh.sh /get-elixir.sh /get-fdb.sh /get-emqtt-bench.sh /get-lux.sh" did not complete successfully: exit code: 2