I get socket error 10038 at startup.
How solve this error?
This is a common error. Try this:
HKEY_CURRENT_USER\SOFTWARE\Embarcadero\BDS\21.0\KnownIDE Packages$(BDS)\Bin\LivePreview270.bpl and change the data from "Embarcadero FireUI Live Preview Package" to "__Embarcadero FireUI Live Preview Package" (so, just add two underscores in front of the text)