Essentials user 4.11 update bug. Z hopper issue

[Alienlmtlss 0]

Since I’ve updated to 4.11 now files that I could’ve printed before the download won’t slice the files.  Keeps showing 

Z Hopper error.  Then turn on in setting and still says the same thing.   
Help please.  Want to go back to older version, and all links go to 4.11 

Anyone else having this issue?  
How do I fix.  Can’t print 

[GregValiant 1,330]

What printer is that?  There have been a couple of manufacturers who had errors in their definition files regarding Z speed.  If you look at "Printer Settings | Maximum Speed Z" and then at "Speed | Z Hop Speed" if the Z-hop speed is higher than the max Z speed then Cura will throw an error and won't slice.  If that is the case then you can raise the Maximum Speed Z or lower the Z-hop speed.  This is just a safety within Cura and has no effect on what is in M203 (Max Feed Rates) in the printer.