Patcher: Invalid checksum

I've been trying to install 3.9.8 and keep getting an invalid checksum error during the downgrade patch.

This happens if I use the installer or if I copy the files and run the patcher manually.

Running a repair on the main game and repeating the install will get the same error but in a different spot in the patch process.

I can play live tarkov

patcher log included

Has anyone else run into this and know of a solution/ workaround?

Last install was 3.8.3

Installer runs fine until it gets to applying the patch. the patcher runs for a short time and then throws the invalid checksum error and quits.

I am happy to report that I finally got 3.9 to install.

I can't say for sure what the actual issue was, though I suspect files were getting corrupted somewhere in the process.

Steps,

disable windows defender

run BSG launcher as admin

integrity check ----> Fail

repair

run SPT installer as admin

I have tried this multiple times before along with various combinations of copying files manually and nothing worked until now and I have no idea why.