Virtual Joystick Ecosystem Sample [ECOSYSTEM] [JULY 2019] Error

[playmakertester]

After downloading and importing the Virtual Joystick Ecosystem Sample [ECOSYSTEM] [JULY 2019],
https://hutonggames.com/playmakerforum/index.php?topic=10839.0

I get the following error every time and cannot play it.

Assets/PlayMaker Custom Actions/Application/ApplicationOpenUrl.cs(27,20): error CS0117: 'Application' does not contain a definition for ' isWebPlayer'.

Please tell me how to handle this error.

[playmakertester]

ApplicationOpenUrl.

if (Application.isWebPlayer)
to
if (Application.platform == RuntimePlatform.WebGLPlayer)
Changed like this and the error disappeared