First off, while the embedded picture is convenient, I sure hope it looks better on your screen than it does above!
Image quality aside, the error is simply saying that it failed to load the ashnet.dll file. Since DLLs in the same directory from whence the EXE was loaded should always be found, that suggests that either your \ate\bin\ directory is missing the ashnet.dll file, or for some other reason it can't be loaded.
Before we get to that, I should also note that ATE only loads ashnet.dll if you are using TELNET rather than SSH. If so, you might want to revisit whether that makes any sense in 2019. Or, if the error appears after you've connected, it would be related to the use of a function like ATHTTP or file transfer that causes ATE to load ashnet.dll to service the request.
If you have the dll in place, and you're sure you're loading the ashw32.exe from that same location, let's first check the properties of the dll to make sure that it is digitally signed, and that the version is at least 1.10 and the size is at least 3 MB. (Anything less would suggest a corrupted file.)
If that's all good, then I suppose it is possible that the DLL is depending on some module that is normally part of Windows but which for some reason is missing on this machine. Unfortunately the Windows DLL loader isn't very nice about reporting that kind of problem, and if we do a general purpose dependency check, it will report hundreds of dependencies (which is typical of any application that relies on standard Windows components, which in turn have a tangled web of their own dependencies).
PS: also realized this was a screen grab from a 3 PC's deep... (Mine => Support => Customer) ergo i'm sure a good deal of detail was lost in the process.