No message with Button "start game". please help me.

I got a problem. I send invitations to friends. No one gets the message where you can click "Start Game".

What is the reason for this?

I get the message with the button of friends.

Ask for help.

Your friends need to make sure they're clicking the ready button. Are they doing this?

I send invitations to my lobby. No one will receive an invitation from Me. When I get an invitation, I can see it.

Why is that?

What platform are you playing on, please?

on Steam / PC

CPU
- Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz

GPU
- NVIDIA GeForce GTX 750 Ti 2 GB

RAM
- 8 GB 1311 @ 1600 MHz

Operating system
- Microsoft Windows 10 Home 64-bit

Motherboard
- MEDION H110H4-CM2 (1151)

Storage
- ST2000DM001-1ER164 1864 GB
- SAMSUNG MZNLF128HCHP-00000 120 GB
- SDHC Card 8 GB
- USB SCSI Disk Device 1864 GB

Optical drives
- TSSTcorp CDDVDW SN-208FB

Audio
- NVIDIA High Definition Audio
- Realtek High Definition Audio

Network
- Realtek PCIe GBE Family Controller

It's possible that your firewall is preventing people from connecting to your PC. I'll pass the issue on to the dev team and see what I can find out for you