java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "java.util.Map.get(Object)" is null
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.BlockState.getProperty(BlockState.java:23) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.ChunkRenderer.parseBlockState(ChunkRenderer.java:33) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.ChunkRenderer_1_18.lambda$renderSection$11(ChunkRenderer_1_18.java:306) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.color.BlockColorMap$StateColors.getColor(BlockColorMap.java:176) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.color.BlockColorMap.getBlockColor(BlockColorMap.java:294) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.ChunkRenderer_1_18.lambda$renderSection$12(ChunkRenderer_1_18.java:304) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) ~[?:?]
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) ~[?:?]
at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.ChunkRenderer_1_18.renderSection(ChunkRenderer_1_18.java:307) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.ChunkRenderer_1_18.renderChunk(ChunkRenderer_1_18.java:191) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.RegionRenderer.renderRaw(RegionRenderer.java:149) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.renderer.RegionRenderer.render(RegionRenderer.java:61) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.world.RegionFolder$WorldRegionFolder.render(RegionFolder.java:179) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.de.piegames.blockmap.world.RegionFolder$CachedRegionFolder.render(RegionFolder.java:467) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.BackupHandler.createPreview(BackupHandler.java:145) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at net.creeperhost.ftbbackups.BackupHandler.lambda$createBackup$4(BackupHandler.java:250) ~[ftbbackups2-forge-1.19.2-1.0.17.jar%23447!/:?]
at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) [?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
at java.lang.Thread.run(Thread.java:833) [?:?]

[Render thread/WARN]: Shader color_convolve could not find uniform named InSize in the specified shader program.

The log keeps repeating this information

ftbbackups2-forge-1.19.2-1.0.17
polylib-forge-1900.0.2-build.42
architectury-6.4.62-forge

We'll check into this, but that error is just a warning and will mean that you won't have a preview image for your backup. Highly unlikely to be causing your issue.

dupe of #39