Install-SitecoreConfiguration : Cannot retrieve the dynamic parameters for the cmdlet. Unrecognized escape sequence

 If facing below issue at the time of Sitecore instance setup

Install-SitecoreConfiguration : Cannot retrieve the dynamic parameters for the cmdlet. Unrecognized escape sequence.

Then would suggest to update files for

xconnect-xp0.json

sitecore-XP0.json

scinstall.ps1 (in your case, installation script file name may be different)

by searching '\' in above files and replace with "\\" in file path

for example: 

earlier setting was 

$PSScriptRoot\Sitecore 9.0.2 rev. 180604 (OnPrem)_single.scwdp.zip

and replaced with 

$PSScriptRoot\\Sitecore 9.0.2 rev. 180604 (OnPrem)_single.scwdp.zip

and once all settings updated in script, then execute again.

Hope this will help.