pyvisa: VI_ERROR_SYSTEM_ERROR Cannot run pyvisa

I installed ni-visa (via aur packages on arch linux) and pyvisa via pip. When I run python -m visa info I get:

Machine Details:
   Platform ID:    Linux-4.11.9-1-ARCH-x86_64-with-arch
   Processor:      

Python:
   Implementation: CPython
   Executable:     /usr/bin/python
   Version:        3.6.1
   Compiler:       GCC 6.3.1 20170306
   Bits:           64bit
   Build:          Mar 27 2017 00:27:06 (#default)
   Unicode:        UCS4

PyVISA Version: 1.8

Backends:
   ni:
      Version: 1.8 (bundled with PyVISA)
      #1: /usr/vxipnp/linux/lib64/libvisa.so:
         found by: user
         bitness: 64
         Could not get more info:
            VI_ERROR_SYSTEM_ERROR (-1073807360): Unknown system error (miscellaneous error).

Unknown system error doesn’t tell me anything. What can I do about the error?