r5apex.exe - Application Error (0xc0000005)

Well let's try some basic steps first:

Run a System File Check

1. Open up a Command Prompt with Admin perms
2. Run the command "sfc /scannow"

Repair game files

Steam

1. Right click Apex
2. Go to properties
3. Go to Local Files
4. Select "Validate integrity of Game files"

Origin

1. Right click Apex
2. Select repair game files

Check your storage health

Open command prompt in administrator mode and type chkdsk X: /f /r where X is the hard drive letter and hit the ‘Enter’ key.

(If you are using multiple storage mediums, then just go by the drives one by one)

Check your RAM

https://www.techrepublic.com/article/how-to-detect-bad-ram-with-the-windows-memory-diagnostic-tool/

Let me know if anything of this helped, otherwise we gotta find another fix.