Fetching bootstrap failed with error: invalid character '<'

[outbackdingo]

agent built from main fails with error after provisioning in UI

raspberrypi3:~$ export MF_AGENT_BOOTSTRAP_URL="https://mf.domain.com/bootstrap/things/bootstrap"
raspberrypi3:~$ export MF_AGENT_BOOTSTRAP_KEY="19233dbc-abdb-4bbe-89d2-04bc901eb558"
raspberrypi3:~$ export MF_AGENT_BOOTSTRAP_ID="58fd8797-0f24-49e2-b44f-15f5c589a74d"
raspberrypi3:~$ mainflux-agent 


{"level":"info","message":"Requesting config for 58fd8797-0f24-49e2-b44f-15f5c589a74d from https://mf.domian.com/bootstrap/things/bootstrap","ts":"2023-10-23T13:50:09.905466594Z"}
{"level":"error","message":"Fetching bootstrap failed with error: invalid character '<' looking for beginning of value","ts":"2023-10-23T13:50:10.069942172Z"}
{"level":"error","message":"Fetching bootstrap failed with error: invalid character '<' looking for beginning of value","ts":"2023-10-23T13:50:20.12045036Z"}```