Problem with connecting to roboRIO

[Potatonator]

Hi!

We've encountered an issue where our computer is not communicating properly with the roboRIO. I made a post asking about this, but deleted it because we thought it was fixed, but apparently it isn't...This is the error we got:

BUILD FAILED
C:\Users\Spudnik_Commander\wpilib\java\current\ant\build.xml:208: 
Assertion failed boolean test. roboRIO Image does not match plugin, allowed
 image version: 19

(Yes, I did type out the entire error message because I'm posting on a different computer than the one we used for coding.) We were thinking that it's an issue with the Java version on the computer and the roboRIO not matching. Is that correct, and if so, which one should we change? Is it something totally different? We tried reinstalling the JRE on the roboRIO, but we still got the same error.

Thanks!