[jshammah]

Upgrade to Events Calendar pro to 3.8 version – the standard and pro versions have to be the same version.
Go to your plugins page – you should see a notification that Events Calendar Pro has 3.8 update available. You should also see a notification that both the standard and pro version need to be same version – I believe this is the case because the pro version is treated as an add-in to the standard. You’ll probably need a valid license key to upgrade.

Hope this helps.

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