In the process of playing Create: ASTRAL integration package, I encountered the problem of "block cannot be stored normally." After screening, the specific error log that could not be preserved was as follows:

 [13:58:02] [server thread/error]: failed to save chunk [0, -2]

java.util.concurrent.compleTionException: java.lang.nullpointerexception: Cannit Invoke "net.minecraft.server.mineCraftServer_3760 () AUSE "Server" is null
At java.util.concurrent.completableFuture.enCodetHrowable (completableFuture.java:315) ~ [?:?]]]?]?]
At java.util.concurrent.completableFuture.comPleTetHrowable (CompletableFuture.java:320) ~ [?:?]]?]]?]?]?]?]?]?]?]?
At java.util.concurrent.completableFuture $ Uniaccept.tryfire (CompletableFuture.java:722) ~ [?:?]
At java.util.concurrent.completableFuture $ complete.
At network.minecraft.class_3898.Method_20605 (class_3898.java:509) ~ [client- intermediaary.jar:]
At network.minecraft.class_3898.Method_17233 (Class_3898.java:471) ~ [client-intermediaary.jar:]
At network.minecraft.class_3215.Method_12127 (class_3215.java:325) ~ [client- intermediaary.jar:]
At network.minecraft.server.minecraftserver.method_3782 (minecraftserver.java:621) ~ [client- intermediary.jar :?]]]]]]]]]]]]]]]]]]
At network.minecraft.class_1132.Method_3782 (class_1132.java:193) ~ [client- intermediaary.jar:]
At network.minecraft.server.minecraftserver.method_29741 (mineCraftserver.java:729) ~ [client- intermediary.jar :?]]]]]]]]]]]]]]]]]]]]]]
At network.minecraft.server.minecraftserver.method_29739 (minecraftserver.java:273) ~ [client- intermediary.jar :?] at java.lang.thread.run (thread. java: 833) [?:?]
Caused by: java.lang.nullpointerexception: Cannot Invoke "net.minecraft.server.minecraftserver.method_3760 ()" beCAUSE "is null" is null "is null" is null "is null" is null "is null.
At dan200.Computercript.shared.network.networkhandler.settoallplayers (networkhandler.java:110) ~ [cc-Resitched-1.100.8.jar :?]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]?
At dan200.ComputerCraft.Shared.comPuter.core.servercomPuter.BroadCastDelete (serverComputer.java:195) ~ [cc-RestiTched 1.100.8.jar:?
At dan200.Computercript.shared.comPuter.core.servercomputerregship.remove (serverComputerRegistry.java:54) ~ [cc-reastitched-1.100.8.jar :?]]]]]]]]]]]]]]]]]]]]]]]]] 1.100.8.jar:?
At dan200.Computercraft.Shared.comPuter.blocks.Tilecomputerbase.unload (tilecomputerbase.java:79) ~ [cc -Restitched-1.100.8.jar :?]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]?
at dan200.computercraft.shared.computer.blocks.TileComputerBase.onChunkUnloaded(TileComputerBase.java:97) ~[cc-restitched-1.100.8.jar:?]
At dan200.comPuterscript.shared.proxy.ComputerCraftProxyCommon.lambda $ registerhandlers $ 6 (computercraftproxycommon.java:127) ~ [cc-restitched -10 0.8.jar :?]
At network.fabricmc.fabric.api.event.lifecycle.v1.ServerBlockEvents.Lambda $ Static $ 2 (ServerBlockEvents.java:66) ~ [Fabric-Lifecy CLE-EVENTS-V1-2.1.1+CC71601C60-87d8F81297025.jar:]
at network.fabricmc.fabric.impl.event.lifecycle.Lifecycleeventsimpl.Lambda $ Oninitialize $ 2 YCLE-EVENTS-V1-2.1.1+CC71601C60-87d81297025.jar:] at NET.fabricmc.fabric.api.event.lifecycle.v1.ServerChunes.lambda $ Static $ 2 .1+CC71601C60-87d8F812A1297025.jar:]
at net.minecraft.class_3898.handler$ddm000$fabric-lifecycle-events-v1$onChunkUnload(class_3898.java:6933) ~[client-intermediary.jar:?]
At network.minecraft.class_3898.Method_18843 (class_3898.java:535) ~ [client- intermediaary.jar:]
At java.util.Concurrent.completableFuture $ Uniaccept.tryfire (CompletableFuture.java:718) ~ [?:?]
... 9 More 

After using the AI ​​tool, AI's analysis of this problem is like this:

 This error log comes from the Minecraft server when trying to save a block.The error log shows a java.UL.CURRENT.COMPLETINEEPTION abnormality. The root cause is a java.lang.nullPointerexception.

This usually means that problems have occurred when trying or operating an object that has not been initialized correctly or has been recovered by garbage.
Let us gradually analyze the error log:
Error Time and Type: [13:58:02] [Server Thread/Error]: It means a error reported at the 13:58:02 server thread.
Error message: Failed to save chunk [0, -2] indicates that the server fails to save the coordinates of [0, -2].
Abnormal type: java.util.concurrent.compleTionException is usually related to asynchronous operations, indicating that an asynchronous task encountered abnormalities during the execution process.
Fundamental reason: Java.lang.nullpointerexception indicates an object of trying to access a vacuum (NULL).
Question code: Cannot Invoke "net.minecraft.server.minecraftserver.method_3760 ()" BeCAUSE "Server" is null. The Server object is empty.
Plug-in/module involved: Dan200.com and Fabric-Lifecycle-Events-V1 are mentioned in the error log. MoldThe group loader is related to API).Calling stack: The rest of the log shows the call stack that occurs abnormal, which helps developers to determine the exact position of the problem.
The following steps may require the following steps:
Confirm that the Minecraft server status: ensure that the server is completely started without encountering other fatal errors.
Check the ComputerCraft module: Because the error is related to the ComputerCraft module, check whether the module is updated or fixed patch.
Check the server configuration: There is no error in confirming the configuration file of the server (such as Server.properties), and all the necessary settings are correct.
Check the compatibility of other modules: If the server runs multiple modules to ensure that they are compatible and there is no conflict.
Check the log file: Check the complete log file of the server to find possible mode or other related errors.
Restart server: Sometimes restart the server can solve some temporary memory or status problems.
Contact module developer: If the problem continues, you may need to contact the Computercraft or other developers involving modules to seek help.
Backup data: Before trying any repair, make sure the world data of the server is backup to prevent data loss.
Technical Forum and Community: If you solve difficulties yourself, you can seek help in Minecraft's technical forums or related communities, where there are many experienced players and developers.
Please note that due to the complexity of Minecraft and related modules, fixing such problems may require certain technical knowledge and understand the operation of the Minecraft server.

In the end, I found that the computer module installed in this integration package is "CC: RESTITCHED", and the module version is "V1.100.8".Strategies to solve the problem of "preservation failure".

The problem is already described on Github, and according to the content of the place here, some people have submitted the code to repair this problem.Unfortunately, this submitted code has not been added to the issued version, and maybe you can try to compile or something.