On a windows system I keep the executables in C:\Program Files\ SourceGit, but 2025.26 starts up with the error:
git: 'Files\SourceGit\SourceGit.exe --core-editor' is not a git command. See 'git --help'.
If I put the SourceGit folder in the root (so the path has no spaces) it starts fine. If I go back to 2025.25 in the Program Files folder, that starts up fine.