Barcode wizard font problem

I'm using the barcode wizard often. I need it to create EAN-13 codes. In the past I had no problems with the wizard: Barcodes and the corespondending number was created and displayed well.

Today i see instead of the numbers only small rectangles as placeholder of each number. The font OCR-B 10 BT is correctly installed in Windows.

Searching here brought no solution for my version of the problem.

I'm using:

CorelDraw Graphics Suite 2017 (19.1.0.419) German

Windows 10 Pro_64 Bit (1703 Build 15063.540) German

Has someone a hint for me?

Regards Thomas