This PR fixes java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0

[Vulcano771]

[13:21:00 WARN]: org.apache.commons.lang.UnhandledException: Plugin skript-reflect v2.3 generated an exception while executing task 6
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
        at org.github.paperspigot.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:23)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
        at java.base/java.lang.Thread.run(Thread.java:1623)
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
        at ch.njol.skript.lang.Variable.change(Variable.java:517)
        at com.btk5h.skriptmirror.skript.reflect.sections.Section.run(Section.java:36)
        at com.btk5h.skriptmirror.skript.reflect.sections.EffRunSection.lambda$walk$2(EffRunSection.java:92)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
        ... 4 more

on load:
    create new section with {_request} stored in {test}:
        if {_request} is not set:
            return false
        
        return true
    run section {test} async with {_n} and store result in {_result} and wait
    broadcast "Result: %{_result}%"

Tested in old and latest version (1.20.4) - in both the error exists.
This pr fixes that

[sovdeeth]

looks good

[UnderscoreTud]

Looks good as a band-aid fix, but I think this should be handled directly in Skript's variable changer