locked Nothing is displayed in JTAlert

Koike Toshiya

After updating to Windows10 1909 -> 2004 this morning, JTAlert is blank. There is such a message. Where should I fix it?

Koike Toshiya

I'm sorry everyone.
The problem has been resolved.
I shut down my PC a few times and started it up and it worked fine.
Thank you everyone.

de JL1JVT Toshiya