The description of a managed beta package reads: "use to test and validate this package internally and with selected customers before release. Note: this type of package can only be installed in Developer Edition, sandbox organizations, or testing organizations for registered partners."
However, we're trying to install a managed beta package in a Professional Edition Sandbox (the sandbox type is "Developer"). Shouldn't this work based on the description above?
We're getting an error "Installing this package requires the following feature and it's associated permissions: Apex Classes"
I know PE doesn't support running Apex unless it's from a managed package in the ISV force program that's gone through security review - but shouldn't the Managed Beta package work in this case?