E-filing of the extension is currently available. 

Having Same problem here.

E-filing shut down in December and won't open up until later this month.

990PF rejected due to efile database error with entity year end which has not changed in 33 years!!

@TABCO_88 

You already have our own topic running here:

https://proconnect.intuit.com/community/lacerte-tax-discussions/discussion/how-to-resolve-error-f990...

This topic from last summer likely doesn't apply to your issue now.