my github publish workflow throws new errors after updating to a self contained vault:

Run yarn dendron publish export --target github --yes
yarn run v1.22.18
$ /node_modules/.bin/dendron publish export --target github --yes
🌱 checking if NextJS template is initialized
🌱 NextJS template is already initialized.
generating metadata for publishing...
TypeError: Cannot read properties of undefined (reading 'dendron.defaultTimestampDecorationFormat')
    at Function.getFM (/node_modules/@dendronhq/engine-server/lib/markdown/utilsv5.js:123:102)
    at Function._procRemark (/node_modules/@dendronhq/engine-server/lib/markdown/utilsv5.js:187:53)
    at Function.procRemarkParse (/node_modules/@dendronhq/engine-server/lib/markdown/utilsv5.js:342:21)
    at Function._procRehype (/node_modules/@dendronhq/engine-server/lib/markdown/utilsv5.js:284:35)
    at Function.procRehypeFull (/node_modules/@dendronhq/engine-server/lib/markdown/utilsv5.js:364:27)
    at NextjsExportPod._renderNote (/node_modules/@dendronhq/pods-core/lib/builtin/NextjsExportPod.js:174:48)
    at NextjsExportPod.renderBodyToHTML (/h...

any idea why that might be happening? What part of my configuration is relevant here?