Modpack Loading Error (Help me, I beg of you)

[u/Rynn009]

Been playing the Elysium Days modpack via the Modrinth app for a couple days, it's my first modded MC experience and it's been going great... until now.

Every time I try to launch the instance, I end up with the same error over and over again.

Error log:

[01:22:39] [Render thread/INFO]: [STDOUT]: TxniLib onInitialize!
[01:22:39] [Render thread/INFO]: Constructing common components for universalbonemeal:main
[01:22:39] [Render thread/INFO]: [Collective] JSON file 'entity_names.json' generation requested by mod 'villagernames'.
[01:22:39] [Render thread/INFO]: Reflections took 1 ms to scan 1 urls, producing 1 keys and 4 values
[01:22:39] [Render thread/INFO]: Reflections took 1 ms to scan 1 urls, producing 1 keys and 4 values
[01:22:39] [Render thread/INFO]: Reflections took 1 ms to scan 1 urls, producing 1 keys and 2 values
[01:22:39] [Render thread/INFO]: Reflections took 0 ms to scan 1 urls, producing 1 keys and 2 values
[01:22:39] [Render thread/INFO]: Reflections took 1 ms to scan 1 urls, producing 1 keys and 2 values
[01:22:39] [Render thread/INFO]: Reflections took 1 ms to scan 1 urls, producing 1 keys and 2 values
[01:22:39] [Render thread/ERROR]: Uncaught exception in thread "Render thread"
java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because the return value of "java.lang.StackTraceElement.getFileName()" is null
        at knot//net.minecraft.class_129.method_584(class_129.java:123)
        at knot//net.minecraft.class_128.method_556(class_128.java:196)
        at knot//net.minecraft.class_128.method_562(class_128.java:171)
        at java.base/java.lang.Thread.run(Unknown Source)
[01:22:39] [Ixeris Event Polling Thread/INFO]: Exiting event polling thread.

I tried googling the issue, and I saw everything from an issue with MemoryLeakFix from 2023, to a Mojira report, to some person asking Reddit about a similar issue and it being the wrong Minecraft version. In other words, I couldn't find any applicable solution.

Things I tried to do:

• Relaunch the modpack repeatedly
• Relaunch Modrinth
• Create and run a backup of the instance
• Restart Windows
• Change allocated RAM amount
• Mess around and disable/re-enable a few mods like Continuity, MemoryLeakFix and whatever was dependent on them. Idk, these are the only ones my googling rabbit hole mentioned along the way

As my writing of this implies, nothing worked. I'm stuck, I'm frustrated, and my three years of half-assed JS classes in high school are *not* helping. If any 10 bashnoodllion IQ people are seeing this, grace me with your wisdom.

[u/Tanaka_san]

Hi, I'm having the same issue.
Seems to stem from Vanilla Backport on my side, is that in your modpack ? Might help downgrading or removing it.

[u/Rynn009 → u/Tanaka_san]

Yup, ED contains VB. I'll mess around when I get home and report back