Typically just sending the full ZIP file is best. Also, for specific docker issues, make sure that you post in the author's forum page. If you are using Linuxserver.io's NZBGet, then you can find it here:
I can't be certain, I've not encountered the same issue (using SABNzbD), but I am seeing BTRFS errors/warnings in your syslog:
Sep 6 13:58:14 Tower kernel: BTRFS warning (device nvme1n1p1): csum failed root 5 ino 92185 off 335380480 csum 0x90b48b64 expected csum 0xed4418db mirror 1
Sep 6 13:58:14 Tower kernel: BTRFS error (device nvme1n1p1): bdev /dev/nvme1n1p1 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0
Other forums indicate deleting/recreating your docker.img which is pretty simply:
Login to your system from the unRAID webGui (http://tower or http://tower.local from Mac by default).
Navigate to the Docker tab.
Stop the Docker service if it is not already.
Click the checkbox next to the Docker image that says Delete Image File.
Click the Delete button after clicking the checkbox to delete the image (this may take some time depending on the size of your image).
After the file has been deleted, you can simply re-enable the Docker service and the image will be created in the same storage location with the same name.
Once you've done that, you may also want to delete your NZBGet docker and completely wipe the folder in appdata for it to clear all settings, then rebuild it.
If you've already done this, you may want to install the "Fix Common Problems" app, see if it identifies any issues, and resolve as appropriate.
Again, I'm still a bit of a n00b, but just some steps I've done to resolve issues with my initial setup. If you've tried all these and aren't sure where to go next, post in the forum I linked above.