Directory stack empty

I'm getting the error message "Directory stack empty" where I didn't get it with version 20:

C:\Junk>type Foo.btm
*setlocal

C:\Junk>pushd C:\Junk\Bar\ & c:\Junk\Foo.btm & popd
TCC: Directory stack empty

C:\Junk\Bar>ver

TCC 21.00.21 x64 Windows 10 [Version 10.0.14393]

C:\Junk\Bar>