[update] Activating this plugin sent my site into maintance mode

[UPDATE]
My site is back up and running. I now see it was NOT this plugin, but a theme update issue I was having that gave me the error. This plugin seems to be working very well, actually!
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I downloaded and activiated the plugin, and upon doing so the front and backend of the site denied me access, saying “Briefly unavailable for scheduled maintenance. Check back in a minute.” I had to delete the plugin to regain access.