Try the "Lacerte Tool Hub" and run:  

Lacerte Tool Hub> Install> WebSetup/force. 

If it doesn't help, you may need to consider re-installing Lacerte.  

I've experienced different snags but got them fixed after running the Tool Hub.  Have gotten more grieves from Lacerte than normal this season.  Speaking of which, I got another Tax Engine error last night after printing.  

The explanation to me was that sometimes Updated files would not be in sync with some of the System files.

@George4Tacks once said that instead of updating, he would install.  I don't know if he still does that.  I get nervous if I uninstall and install....  I hope he'll chime in here.

Hope this helps.