My Hugo site was working fine until recently, and suddenly stopped deploying from Github. Per the log output below, it looks like a permissions issue. I tried unlinking and re-linking my repository to make sure it is authorized. No luck.
Site name: voluble-biscotti-9b477e.netlify.app
9:14:52 PM: build-image version: 5b0ab77c5e46895703390c45e86a907d4b78547b (focal) 9:14:52 PM: buildbot version: 5b0ab77c5e46895703390c45e86a907d4b78547b 9:14:52 PM: Building without cache 9:14:52 PM: Starting to prepare the repo for build 9:14:53 PM: Failing build: Failed to prepare repo 9:14:53 PM: Failed during stage 'preparing repo': error checking for ref: : remote: Internal Server Error. remote: fatal: unable to access 'https://github.com/digitalhobbit/topicfountain.com/': The requested URL returned error: 500 : exit status 128 9:14:54 PM: Finished processing build request in 1.328s
Build settings screenshot: