What is Error 87?

Error 87 is an error that may occur on the Windows platform. Typically the wording is "Error 87: The parameter is incorrect"

The more likely cause for the error is a service-related error while connecting using IKEv2. Let's address these potential issues:

1. Press the Windows Key and R to open the 'Run' command window
2. Type 'services.msc' into the field and click OK
3. Sort the list of services by name and search for the following:
   • Plug and Play
   • Remote Access Auto Connection Manager
   • Remote Access Connection Manager
   • Telephony
4. For each of the above services:
   1. Right-click the service and select Properties
   2. In the General tab, ensure the Startup Type setting is set to Manual
   3. Click Apply and then click Start

If the issue persists, perform the following:

• Download and install the C++ redistributables

C++ Redistributables (32-bit)

C++ Redistributables (64-bit)

• After installation, restart the computer and try the connection again.