IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath

Question

When I try to make a simple module in IntelliJ it responds with:

Fatal Error: Unable to find package java.lang in classpath or bootclasspath

Answer 1

After following this answer, I learned that %LOCALAPPDATA%/IDEA/config/options/jdk.table.xml contained incorrect entries. Fixing the JDK table fixed the problem.