Fix error on latest paper while copying entities (#2006)

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/PaperweightPlatformAdapter.java

@@ -188,6 +188,7 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
                 ServerLevel.class.getDeclaredMethod("getEntityLookup");
                 chunkRewrite = true;
                 PAPER_CHUNK_GEN_ALL_ENTITIES = ChunkEntitySlices.class.getDeclaredMethod("getAllEntities");
+                PAPER_CHUNK_GEN_ALL_ENTITIES.setAccessible(true);
             } catch (NoSuchMethodException ignored) {
                 chunkRewrite = false;
             }