I just tried to activate again, and it’s working now 🙂
Good to hear you got it working. That error has always eluded me as to why.
Not sure if this helps track the gremlin down or not, but I got the error on the “Activate Plugin” screen right after installation, but not with the “Activate” link on the Plugins page.
FWIW, there ya go.
@mugwumpr, that actually lead me to find the issue. 🙂
The issue is in version 1.4.0 and down, and is caused by the bundling of CMB2 with Etsy Importer. The activate link right after installing from the admin installer, had the following:
/wp-admin/plugins.php?action=activate&plugin=etsy-importer/CMB2/init.php&_wpnonce=11b9d2af29
The plugin was finding the CMB2 header first, for some reason. What it should say is the following:
/wp-admin/plugins.php?action=activate&plugin=etsy-importer/etsy-importer.php&_wpnonce=11b9d2af29
I will get this fixed in the next version.
Actually I slipped it in without a version bump 😀
