Lost MonoBleedingEdge folder

[ixi65]

A21 will not start. The whole game 7DTD alpha 21, it's The Fun Pimps short logo for me.
When you buy something in a store, do you have to take it to the service center to get it repaired?
This is Alpha 21 for gamers.
It's very frustrating to play good A20.7 but not be able to play A21 with friends.

In the output_log client file there is this message:

Fallback handler could not load library C:/Program Files(x86)/Steam/steamapps/common/7 Days To Die/7DaysToDie_Data/MonoBleedingEdge/data-0000012ACDFADF80.dll
Crash!!!

There is no MonoBleedingEdge folder in the indicated game directory: /7DaysToDie_Data. This folder has not been installed on my computer.

But this folder is here:
C:/Program Files(x86)/Steam/steamapps/common/7 Days To Die/MonoBleedingEdge/
- where are the subfolders: EmbedRuntime and etc. but without the file indicated in the log:data-0000012ACDFADF80.dll

There was no problem with the previous version.
Any ideas?
Thanks