Hi Nahuel,
Would you mind to provide more details, i.e.:
– have you tried to use Test Connection button in the build feature, does it report success?
– do you observe any errors on the build configuration overview page?
– if you have any commits in the default branch, do any builds trigger on these?
– what is the branch filter value on your VCS trigger?
– could it be the case, that the settings of the build feature are set in a such way, to filter out all your pull requests? It could happen for example if you use default settings and all your pull requests are coming from contributors outside your organisation (in GitHub terms).