I just bought the PDF-embed and ResponsiveLayout stacks, to use with RW 8.1.4. For each, I double-clicked the .addons file to install, and in each case the installation was reported as Done.
Yet when I open the corresponding .rwsw demo file, allow RW to upgrade it to .rw8, and save it, I see in the layout view an error
The stack is not currently installed. You need to reinstall it to use it
(and similarly for ResponsiveLayout).
But if I do try to reinstall, I get a message that it’s already installed, and even if I go ahead and allow a reinstall, still the layout page shows the same error.
What’s wrong, and how does one fix it?