[firtool] Firtool 1.138.0 failed to create diretories on Windows

[Siudya]

Platform: Windows 11, x64 Firtool: 1.138.0 test.txt Comman line:

firtool --split-verilog --format fir test.txt -o rtl

Logs:

firtool-1.138.0 : test.txt:0:0: error: cannot create output directory "rtl\verificationsert": No mapping for the Unicode character exists in 
the target multi-byte code page.

...