mkcert -csr error

[townsendren]

When I run the mkcert -csr to generate certificate from an CSR, and get below errors, could you hlep.
mkcert.exe -csr .\scc_ui_csr.pem
panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
main.(*mkcert).fileNames(0xc0001f2000?, {0x0?, 0xc00007d778?, 0xc000136000?})
/home/runner/work/mkcert/mkcert/cert.go:177 +0x265
main.(*mkcert).makeCertFromCSR(0xc00007def8)
/home/runner/work/mkcert/mkcert/cert.go:268 +0xb08
main.(*mkcert).Run(0xc00007def8, {0xc0000220b0?, 0x0, 0x1})
/home/runner/work/mkcert/mkcert/main.go:207 +0x466
main.main()
/home/runner/work/mkcert/mkcert/main.go:149 +0x765