How do I increase the JVM heap size in IntelliJ IDEA to resolve the 'Could not create the Java Virtual Machine' error?

You can increase the heap size by modifying the `idea.vmoptions` file. Locate this file (the location varies depending on your OS and IntelliJ IDEA version - search online if you cannot find it). Inside this file, change the `-Xmx` value to a larger size (e.g., `-Xmx2g` for 2GB). Also, consider adjusting `-Xms` (initial heap size) and `-XX:MaxMetaspaceSize` if necessary.