Singleplayer world fine then Crashes (Like a server???) - No crash report - Log Spammed

[Gamefreaknet]

In short I have a singleplayer world I play a bit. I can do it for 30 minutes before it freezes and gets stuck not responding. 
From the logs I see something relating to one of my mods called Tickdynamic spamming the logs but not sure if thats causing the crash or its spamming trying to fix something about another mod???
When it does crash it comes up with: Shutting Down Internal Server
Couldnt save to Mclogs for some reason so used alternative site:
https://jmp.sh/s/CbCvBJFhxDTUaQBIXvee - latest log
https://jmp.sh/s/UW7eZjDP3WjgReBomCJ3 - debug log
The spam is shown in the debug log (for some reason before other stuff got loaded it looks like) so not sure what's really happening there....

Edited November 10, 2023 by Gamefreaknet
Missing Information

[TileEntity]

Something with chiselsandbits is broken (invalid wood/log block)

Backup the world and remove the mod

Load into it - if this works, add the mod again

[Gamefreaknet]

22 minutes ago, TileEntity said:

Something with chiselsandbits is broken (invalid wood/log block)

Backup the world and remove the mod

Load into it - if this works, add the mod again

(Might sound strange) I am not 100% sure how to do world backups....
Do I just find the world save folder and copy it across to my PC somewhere so it is spare or something else?
I notice multiple mods are available to make "custom backups" however not so sure how good/reliable they are (probs are enough but not totally sure)

Edited November 10, 2023 by Gamefreaknet
Info

[Gamefreaknet]

1 hour ago, TileEntity said:

Something with chiselsandbits is broken (invalid wood/log block)

Backup the world and remove the mod

Load into it - if this works, add the mod again

Just chisel and bits (not Rechiseled also)? (Have just disabled chisel and bits for now and if there are any mods that have it as a dependency will disable those mods also)

[Gamefreaknet]

1 hour ago, TileEntity said:

Something with chiselsandbits is broken (invalid wood/log block)

Backup the world and remove the mod

Load into it - if this works, add the mod again

Also is it that if I can enter the world fine (without the world crashing or something?) it's not to do with chisel and bits but something it's trying to modify??? 
(So it'd be fine in that case)?

[Gamefreaknet]

1 hour ago, TileEntity said:

Something with chiselsandbits is broken (invalid wood/log block)

Backup the world and remove the mod

Load into it - if this works, add the mod again

Works fine without Chisel and Bits