I completed the steps on your website for Unity integration, but I receive a compile error 'OneSignal' does not contain a definition for 'Initialize'

[breban1]

How can we help?

I completed the steps on the OneSignal website for Unity integration, but I receive a compile error 'OneSignal' does not contain a definition for 'Initialize'. It's like OneSignal isn't installed.

Using Unity 2020.3.42f1 LTS
Using the latest OneSignal asset from the asset store v3.0.11

In Unity when I click Windows->OneSignal SDK Setup it shows all steps are complete (all "Run" are grayed out).

I see files for OneSignal in:
Assets->OneSignal
Assets->Plugins->Android->OneSignalConfig.plugin

And 3 OneSignal packages:
Android, Core, and iOS

Code of Conduct

• I agree to follow this project's Code of Conduct

[victornor]

In 3.0.11 you have to call Initialize on OneSignal.Default.Initialize(appid);
In the latest 5.x version it's OneSignal.Initialize(appid);

[shepherd-l]

victornor is correct. 3.x uses the OneSignal.Default static class

Our documentation website defaults to the latest version, 5.x

If you would like to see our 3.x documentation, you can find it in our v9.0 docs:
https://documentation.onesignal.com/v9.0/docs/sdk-reference

Going to close this issue for now, but let me know if you have any further questions