Dear Support,
we are also facing with the same problem.
When I’ve installed the plugin on my local computer, WP stored the uploaded file localy, and after it uploaded to the bucket.
At this moment when the site / plugin runs on Google Cloud then it doesn’t work, because the root file system is read only…
Thank you for you help in advance.
PS: do you accept a donation for this fantastic plugin?
Best regards,
Sandor for Hungary