Build fails: gatsby site build fails & no logs

i’m working on a live prismic/gatsby site ( & my pr-builds have started to fail when committing to github (github triggers deploy preview via netlify app). get a ‘deploy failed’ but no logs (please check the logs-link gives ‘page not found’) & can’t see the failed build in netlify control panel’s list of deploys. the production builds triggered by the Prismic hook don’t have this problem.

since i don’t get any logs it’s hard to troubleshoot.
build settings:

base directory: not set
build command: gatsby build
publish directory: /public

i can build locally & deploy to netlify with no issues

hi kanalje, can you tell us your netlify site name please?