reconfigure excepcion error

Today I try to reconfigure my test server to test latest Let's Encrypt plugin, but when I run the command './imscp-reconfigure -dar panel_ssl' there are an exception:

Quote

Error while performing step: │
│ │
│ Packages installation... │
│ │
│ Error was: │
│ │
│ iMSCP::Stepper::_callback: Could not delete /var/lib/nginx: problem unlinking (unreachable)/imscp/engine/setup: cannot stat initial working directory: No │
│ such file or directory

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i-MSCP version: 1.3.3
OS: Debian 8.6
Server: VM
Mounts: no any mount below /var/...

The /var/lib/nginx folder not exists.

I try to rerun the command, and the following errors come:

Quote

Can't locate iMSCP/Debug.pm in @INC (you may need to install the iMSCP::Debug module) (@INC contains: (unreachable)/imscp/engine/setup/.. (unreachable)/imscp/engine/setup/../PerlLib (unreachable)/imscp/engine/setup/../PerlVendor /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.20.2 /usr/local/share/perl/5.20.2 /usr/lib/x86_64-linux-gnu/perl5/5.20 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.20 /usr/share/perl/5.20 /usr/local/lib/site_perl .) at ./imscp-reconfigure line 34.
BEGIN failed--compilation aborted at ./imscp-reconfigure line 34.

I don't want to install latest i-mscp for now, first I would like to test plugins under this version.
I think I make a huge mistake, that Panelredirect plugin was enabled during reconfigure process. Maybe this cause the problem.
Any idea what should I do?

Ok, thank you, I will do it, and reply as soon as possible.

Problem solved after rerun the installer. Thx Nuxwin for the tip.