SRCDS won't start

When I updated my server after the previous source engine update, it seems that now I cannot start srcds at all. I have updated and verified countless times and even tried a full, clean reinstall but srcds will still not start. I see the first few lines of console output and then it seems to just stall indefinitely. Does anyone know what might be wrong?

What I see

The command line in my batch file goes
srcds.exe -console -condebug -game garrysmod +map gm_flatgrass +maxplayers 8

I had the same issue with one of my servers.

-verify_all fixed it, even though the verify didn’t download any actual new files.

I also deleted installrecord.block and clientregistry.blob in the hldsupdatetool directory.

I tried that but it did not solve anything. I’m still stuck with the same problem.