There is a problem when starting a build for WebGL made with Unity 2019. Every time I try to play it the browser shows an alert saying:
Object doesn't support property or method 'buildCompatibilityCheck'
The build is generated without any problem and within Unity it works as it should.
When I test a mirror version of the project in Unity 2018 the build works. So it seems like the problem comes with Unity 2019 as it happens with every WebGL build made with this version.
Why is this happening? and how can I fix it?