Minecraft Feed The Beast [Direwolf] can't start?

Unfortunately, after a long googling, I still couldn't find a solution how to fix the problem.

And it's about when I select my modpack at Feed the Beast Launcher, the Minecraft Launcher opens. But after I click on play I get this message [BILD].

I already have the latest Java version.

I've already added Minecraft and the FTB Launcher as an exception to the firewall.

Everything is done as admin.
Drivers are all up-to-date.

My PC components meet the requirements of Minecraft (also with modpacks)

It would be great if someone could help me.

Kind regards,
gremmli

Does it not work with normal versions without a client?