Users who had more than ~200 repositories in their GitLab.com organization were hitting a timeout error when setting up a new project that required them to select one of their repositories.
To resolve the timeout, we reduced the number of repositories displayed in the CircleCI UI to be the 100 most recently used repositories.
We have just released a change to the project creation flow in the CircleCI UI that enables searching through all GitLab repositories without any timeout errors, not just the 100 most recently used ones.