Sometime within the last 7 hours, we started getting the following on the admin interface:
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Your license key [XXX] is invalid. Possible reasons for this include:
The license key has been entered incorrectly
The domain being used to access your install has changed
The IP address your install is located on has changed
The directory you are using has changed
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This has us greatly concerned. Users can log in, but see no data (no tickets, invoices, etc.).
No changes occurred at our end.