We have a similar problem, where VIX stopped working altogether after installing the 15.5 update. 15.0.0 is referenced in our vixwrapper-product-config file too and this is an excerpt from the log file in %TEMP%:
2019-10-04T03:21:39.450-04:00| host-7824| I125: Log for VixWrapper pid=7820 version=1 build=build-14665864 option=Release
2019-10-04T03:21:39.450-04:00| host-7824| I125: The process is 64-bit.
2019-10-04T03:21:39.450-04:00| host-7824| I125: Host codepage=windows-1252 encoding=windows-1252
2019-10-04T03:21:39.450-04:00| host-7824| I125: Host is Windows Server 2012 Standard Edition, 64-bit (Build 9200)
2019-10-04T03:21:39.434-04:00| host-7824| I125: DictionaryLoad: Cannot open file "C:\Users\bbierman\AppData\Roaming\VMware\config.ini": The system cannot find the file specified.
2019-10-04T03:21:39.434-04:00| host-7824| I125: [msg.dictionary.load.openFailed] Cannot open file "C:\Users\bbierman\AppData\Roaming\VMware\config.ini": The system cannot find the file specified.
2019-10-04T03:21:39.434-04:00| host-7824| I125: PREF Optional preferences file not found at C:\Users\bbierman\AppData\Roaming\VMware\config.ini. Using default values.
2019-10-04T03:21:39.434-04:00| host-7824| I125: FILE: FileLockDynaLink: Further process validation tools are: available
2019-10-04T03:21:39.448-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Users\bbierman\AppData\Local\Temp\2\vmware-bbierman", ...) failed, error: 2
2019-10-04T03:21:39.451-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("vixWrapperDiscovery.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.459-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.460-04:00| host-7824| I125: Win32U_GetFileAttributes: GetFileAttributesExW("C:\Program Files (x86)\VMware\VMware VIX\\Workstation-15.0.0\64bit\vmwarebase.dll", ...) failed, error: 2
2019-10-04T03:21:39.460-04:00| host-7824| I125: passed in VIX_SERVICEPROVIDER_DEFAULT, computed hostType as 3
2019-10-04T03:21:39.460-04:00| host-7824| I125: Workstation installed version is 15.5.0
2019-10-04T03:21:39.460-04:00| host-7824| I125: No implementation found for service provider 3, apiVersion -1 installedVersion 15.5.0
2019-10-04T03:21:39.460-04:00| host-7824| I125: No Vix library found for provider 1 revision -1, err 22002