How do I install Arduino Web Editor plugin on chrome OS ?

Hi - I'm new to ChromeOS & Adruino. Similar as original post, not on an Educational google account but the 'try now' button is greyed out. I do have ChromeOS Family Link parental controls setup but no restrictions on Google Playstore for downloads set. I got to the app store both through the 'Getting Started' section for 'Pick your Platform: Chrome OS' here:

And also direct using the link previously posted here:

I have payment set up - but in both above links the 'Try Now' is greyed out. Probably a ChromeOS thing, not Arduino that I am not familiar with but again new to both platforms an hoping a nice Arduino forum member has experience this! How are the limits on the playstore controlled?

Thank you!