Hi Lylee,
This can occur when the project and build spec are created on a different machine with a slightly different version of the runtime. You should have another 8.0 runtime listed under the additional installers that is not red. You can then uncheck the "red" 8.0 runtime and check the normal one. The reason the one you have checked now if red is because that is the version the build spec is looking for but it does not exist on the system.
For example, if I make a project and build spec that had DAQmx checked as an additional installer, then opened the project on a machine that did not have DAQmx installed, DAQmx would still be checked and listed under additional installers but it would be red.
If you do discover that somehow your system does not have the Run-Time Engine installed, you can download those here.
David_B
Applications Engineer
National Instruments