I am attempting to run vimux's commands in a tmux session on a server for which I am not an administrator. For example, when executing the following within vim:

:call VimuxRunCommand('ls')

I receive the following errors:

Error detected while processing function VimuxRunCommand..VimuxSendKeys.._VimuxTmux:
E484: Can't open file /tmp/vzyU75B/16

Error detected while processing function function VimuxRunCommand..VimuxSendText..VimuxSendKeys.._VimuxTmux:
E484: Can't open file /tmp/vzyU75B/17

Error detected while processing function VimuxRunCommand..VimuxSendKeys.._VimuxTmux:
E484: Can't open file /tmp/vzyU75B/18

Naively, I'm guessing that I'm getting these errors because of some user permissions that I lack. Is this correct, and if so, is there a way around this? Thanks.