issue with new version 4

[blueyeti1994]

the beta version (3) works fine but when i download master version and run using r studio with command renv.::restore(), it gives several errors with issue.
I installed those packages which were giving me error from R studio itsel but rgdal package has been depreceted so i used following command to install anyhow

install.packages("rgdal", repos="http://R-Forge.R-project.org"). Finally when i run the app, it appears and minimizes itself but can't be found anywhere and in R console it displays following error

Listening on http://127.0.0.1:6676 Warning in xfun::prose_index(text) : Code fences are not balanced Warning in xfun::prose_index(text) : Code fences are not balanced Warning: Error in abs: non-numeric argument to mathematical function 45: observe [C:\Users\Sagar\Downloads\StaMPS_Visualizer-master\StaMPS_Visualizer-master/server.R#402] 44: <observer> 1: runApp

hope if anyone has found solution.