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.