Error commits#compare-two-commits not found during PR view

[hski-bayer]

• Extension version: 0.146.0
• VSCode Version: 1.122.1
• OS: Windows 11 Enterprise 23H2
• Repository Clone Configuration (single repository/fork of an upstream repository):
• GitHub Product (GitHub.com/GitHub Enterprise version x.x.x): Github.com bayer-int

Steps to Reproduce:

1. Create a repository and a fork
2. Create a change in origin and fork that will create a merge conflict fork
3. Create a pull request from origin to fork showing a merge conflict, which needs to be merged in VS Code
4. Open VS Code and go to GitHub Pull Requests extension
5. Click on "->" to open the pull request
6. Error message appears, PR is not opened correctly but another PR is shown

Fetching Pull Request merge base failed: Not Found - https://docs.github.com/rest/commits/commits#compare-two-commits