I'm trying to return the Vendor-Specific attribute with value "H=4,I=4" using the rlm_rest module. I've tried the following authorization response payloads: {"Attr-26": "0x483d342c493d34"} {"Vendor-Specific": "H=4,I=4"} Both resulted in error: (0) aaa-api: Processing response header (0) aaa-api: Status : 200 (OK) (0) aaa-api: Type : json (application/json) (0) aaa-api: Parsing attribute "Attr-26" (0) aaa-api: EXPAND 0x483d342c493d34 (0) aaa-api: --> 0x483d342c493d34 (0) aaa-api: WARNING: Incompatible value assignment for attribute "Vendor-Specific", skipping... (1) aaa-api: Processing response header (1) aaa-api: Status : 200 (OK) (1) aaa-api: Type : json (application/json) (1) aaa-api: Parsing attribute "Vendor-Specific" (1) aaa-api: EXPAND H=4,I=4 (1) aaa-api: --> H=4,I=4 (1) aaa-api: WARNING: Incompatible value assignment for attribute "Vendor-Specific", skipping... Any suggestions for what might be incompatible about the value? # radiusd -v radiusd: FreeRADIUS Version 3.0.20, for host x86_64-alpine-linux-musl, built on Apr 20 2020 at 16:30:06