rmarkdown and source call to R file.

Hi!
I'm new in R and this list.
I made a shiny app using R studio.
my files are:
  -server.R
  -ui.R
  -helper.R
  -Report.Rmd.

All the files are on the same directory and helper.R is a file that
contains a lot of functions used in Report.Rmd and server.R

for some reason I cant call from Report.Rmd the file helper.R

My code in Report.Rmd is

  ## Summarize table
  ```{r, echo=FALSE}
  library(knitr)
  source("helper.R", local = knitr::knit_global())
  summarized_table<-give_table(params$ldf_summary)
  kable(summarized_table,"simple")
  ```
If I use absolute path it works but since I want to upload it to 
https://www.shinyapps.io/ I must make it work with relative path.

The message I get is:

  processing file: Report.Rmd
   
  |..........................                                         
                                       |  25%
    ordinary text without R code

   
  |....................................................               
                                       |  50%
  label: unnamed-chunk-1 (with options) 
  List of 1
   $ echo: logi FALSE

  Quitting from lines 13-17 (Report.Rmd) 

  Warning: Error in file: cannot open the connection
    [No stack trace available]


The funny thing is that if I put the cursor inside "" at the beginning
and I press tab I get the option to choose helper.R. So Im guessing
that I'm on the right directory.
Any ideas what I'm missing?

I'm stuck on this lines of code 2 days now.
I would really appreciate
any ideas.


Thanks in advance for your help!!!


ps. I tried all the combinations in Tools->Global Options-> "Evaluate
chunks in directory" with no luck.