@cocoa_vrc 調べてみるとimportMultibaseKey()関数でエラーが出ますね。

error: Uncaught (in promise) TypeError: Unsupported key type: 0x22
    throw new TypeError("Unsupported key type: 0x" + code.toString(16));
          ^
    at importMultibaseKey (https://jsr.io/@fedify/fedify/1.4.0/runtime/key.ts:105:11)
    at Function.__fromJsonLd__Multikey__ (https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:18311:15)
    at eventLoopTick (ext:core/01_core.js:177:7)
    at async https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:18151:26
    at async Function.fromJsonLd (https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:18147:12)
    at async Function.__fromJsonLd__Person__ (https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:60794:9)
    at async https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:60622:26
    at async Function.fromJsonLd (https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:60618:12)
    at async Function.__fromJsonLd__Object__ (https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:7579:16)
    at async https://jsr.io/@fedify/fedify/1.4.0/vocab/vocab.ts:7203:26