Ugdhar

The link to your log does not work, it says it is forbidden, Error, this is a private paste or is pending moderation.

That log is from a Fabric modpack, these are the forge forums, so while someone might stumble on this and know, it will likely take considerably longer than if you asked wherever Fabric support is given. I've never used Fabric myself, so don't know where you'd go for help.

debug.log, can also add the crash if you have one. Make sure to read the FAQ for how to properly post them.

Follow the instructions in the FAQ for posting logs, they will almost always be needed to figure out what is going wrong.

Please read the FAQ for how to properly share your logs.

Please post logs as described in the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/), they will contain information that may help.

Please post complete logs as described in the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/), it will contain more information that may help figure out what your problem is.

These are the Forge forums, you'd probably be better off asking in a fabric forum, if they have one.

See the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/) on how to post logs, and please post a full log, it will have more information that could help figure out what is going wrong.

See the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/) on how to post logs, and please post a full log, it will have more information that could help figure out what is going wrong.

You do not need to post multiple times. When someone sees your post, and has an idea how to help, they will reply. Please see the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/) for how to provide logs. Also it appears you are using fabric, and this is a forge forums, so responses may take longer, since the software may not be used by people here.

Please post logs as described in the FAQ, they will contain information that could help identify the problem

You could try https://paste.ee/ found that link in the FAQ. There's also https://mclo.gs I prefer gist.github.com myself, but I believe you need an account to use github. Only other thing I could suggest if none of these options work would be splitting the log on pastebin or something, and sharing multiple links to the parts.

Don't post an issue in another topic, create your own. Make sure you are using 64 bit java, 32 bit will not support 4GB+

I can't tell from your crash log (perhaps debug.log would have more info?) but when i had a power outage while playing a modpack, it corrupted my save and I had to restore from a previous backup. I'd try backing up the world as it is now, and trying to load a previous backup from before the outage.

Please see https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/ for information on how to post your log correctly.

If you have the inventory tabs mod, that is client side only and will not run on a server.

See the FAQ for information on posting logs. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/

Please post logs as per the FAQ, it will have more information, forge version, etc.

Not really sure what you can do if the --safeMode doesn't work, to be honest. Evidently just starting the server (I assume you ran it once you added forge/mods) was enough to embed those datapacks into your save. Hopefully there's something that can be done for you, and someone will chime in with a solution! Good luck!

The problem is the save is expecting the mods it was run with, probably due to there being items/blocks/etc in the world from those mods. Try adding --safeMode to your commandline that runs the server, and see if that works. [16:45:01] [ServerMain/WARN]: Missing data pack mod:mr_dungeons_andtaverns [16:45:01] [ServerMain/WARN]: Missing data pack mod:torchbowmod [16:45:01] [ServerMain/WARN]: Missing data pack mod:the_afterdark [16:45:01] [ServerMain/WARN]: Missing data pack mod:explorerscompass [16:45:01] [ServerMain/WARN]: Missing data pack mod:darkloot [16:45:01] [ServerMain/WARN]: Missing data pack mod:walljump [16:45:01] [ServerMain/WARN]: Missing data pack mod:terralith [16:45:01] [ServerMain/WARN]: Missing data pack mod:commonnetworking [16:45:01] [ServerMain/WARN]: Missing data pack mod:configlibtxf [16:45:01] [ServerMain/WARN]: Missing data pack mod:forge [16:45:01] [ServerMain/WARN]: Missing data pack mod:journeymap_api [16:45:01] [ServerMain/WARN]: Missing data pack mod:geophilic [16:45:01] [ServerMain/WARN]: Missing data pack mod:collective [16:45:01] [ServerMain/WARN]: Missing data pack mod:structory [16:45:01] [ServerMain/WARN]: Missing data pack mod:journeymap [16:45:01] [ServerMain/WARN]: Missing data pack mod:snowballsfreezemobs [16:45:01] [ServerMain/WARN]: Missing data pack mod:naturescompass [16:45:02] [ServerMain/WARN]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode

Which would mean we should have a vanilla log, but that's a forge log you posted?

I think you forgot to post the link to the log. See the FAQ for more info on how to post logs properly (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/)

What if you try with Java 17? Was just looking at https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/ where it lists Java versions for which version of forge. *edit: And you don't need the x86 packages, just the 64 bit ones

When you click the link and it takes you to the ad page, do you wait the 5 seconds, and click the red Skip button at the top right? Just did it for recommended 1.20 build and it worked fine for me using Firefox. If it still doesn't work, try clicking the +Show All Versions, point at the little (i) next to Installer for the version you want, and click the link for Direct Download.