RStudio Server, Shiny app doesn't launch, the app's page goes grey immediately

Shiny apps used to run perfectly before the update of packages and RStudio server (shiny (1.3.2) and httpuv (1.5.1)). The app's page goes grey inmediately after running the app.

I have tried this Shiny v1.3 known regressions and serious issues , but it still doesn't work. I also tried this https://stackoverflow.com/a/27113322/10004051 and it works, but I will like to not include that extra code.

Example with errors:

shiny::runExample("01_hello")

It works with this workaround:

runExample("01_hello", host="0.0.0.0", port=9999)

This is my session info:

> devtools::session_info()
─ Session info ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value                                      
 version  R version 3.5.3 (2019-03-11)               
 os       Red Hat Enterprise Linux Server 7.6 (Maipo)
 system   x86_64, linux-gnu                          
 ui       RStudio                                    
 language (EN)                                       
 collate  en_US.UTF-8                                
 ctype    en_US.UTF-8                                
 tz       Europe/Madrid                              
 date     2019-08-19                                 
─ Packages ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 package     * version date       lib source        
 assertthat    0.2.1   2019-03-21 [2] CRAN (R 3.5.3)
 backports     1.1.4   2019-04-10 [2] CRAN (R 3.5.3)
 callr         3.3.1   2019-07-18 [2] CRAN (R 3.5.3)
 cli           1.1.0   2019-03-19 [2] CRAN (R 3.5.3)
 crayon        1.3.4   2017-09-16 [2] CRAN (R 3.5.3)
 crosstalk     1.0.0   2016-12-21 [2] CRAN (R 3.5.3)
 curl          4.0     2019-07-22 [2] CRAN (R 3.5.3)
 data.table    1.12.2  2019-04-07 [2] CRAN (R 3.5.3)
 desc          1.2.0   2018-05-01 [2] CRAN (R 3.5.3)
 devtools      2.1.0   2019-07-06 [2] CRAN (R 3.5.3)
 digest        0.6.20  2019-07-04 [2] CRAN (R 3.5.3)
 dplyr       * 0.8.3   2019-07-04 [2] CRAN (R 3.5.3)
 DT          * 0.8     2019-08-07 [2] CRAN (R 3.5.3)
 fs            1.3.1   2019-05-06 [2] CRAN (R 3.5.3)
 glue          1.3.1   2019-03-12 [2] CRAN (R 3.5.3)
 htmltools     0.3.6   2017-04-28 [2] CRAN (R 3.5.3)
 htmlwidgets   1.3     2018-09-30 [2] CRAN (R 3.5.3)
 httpuv        1.5.1   2019-04-05 [1] CRAN (R 3.5.3)
 jsonlite      1.6     2018-12-07 [2] CRAN (R 3.5.3)
 later         0.8.0   2019-02-11 [2] CRAN (R 3.5.3)
 lubridate   * 1.7.4   2018-04-11 [2] CRAN (R 3.5.3)
 magrittr      1.5     2014-11-22 [2] CRAN (R 3.5.3)
 markdown      1.1     2019-08-07 [2] CRAN (R 3.5.3)
 memoise       1.1.0   2017-04-21 [2] CRAN (R 3.5.3)
 mime          0.7     2019-06-11 [2] CRAN (R 3.5.3)
 pillar        1.4.2   2019-06-29 [2] CRAN (R 3.5.3)
 pkgbuild      1.0.4   2019-08-05 [2] CRAN (R 3.5.3)
 pkgconfig     2.0.2   2018-08-16 [2] CRAN (R 3.5.3)
 pkgload       1.0.2   2018-10-29 [2] CRAN (R 3.5.3)
 plyr          1.8.4   2016-06-08 [2] CRAN (R 3.5.3)
 prettyunits   1.0.2   2015-07-13 [2] CRAN (R 3.5.3)
 processx      3.4.1   2019-07-18 [2] CRAN (R 3.5.3)
 promises      1.0.1   2018-04-13 [2] CRAN (R 3.5.3)
 ps            1.3.0   2018-12-21 [2] CRAN (R 3.5.3)
 purrr         0.3.2   2019-03-15 [2] CRAN (R 3.5.3)
 R6            2.3.0   2018-10-04 [2] CRAN (R 3.5.3)
 Rcpp          1.0.2   2019-07-25 [2] CRAN (R 3.5.3)
 remotes       2.1.0   2019-06-24 [2] CRAN (R 3.5.3)
 RevoUtils   * 11.0.3  2019-05-10 [2] local         
 rJava         0.9-11  2019-03-29 [2] CRAN (R 3.5.3)
 rlang         0.4.0   2019-06-25 [2] CRAN (R 3.5.3)
 rprojroot     1.3-2   2018-01-03 [2] CRAN (R 3.5.3)
 rstudioapi    0.10    2019-03-19 [2] CRAN (R 3.5.3)
 sessioninfo   1.1.1   2018-11-05 [2] CRAN (R 3.5.3)
 shiny       * 1.3.2   2019-04-22 [2] CRAN (R 3.5.3)
 shinyjs     * 1.0     2018-01-08 [1] CRAN (R 3.5.3)
 stringi       1.4.3   2019-03-12 [2] CRAN (R 3.5.3)
 stringr       1.4.0   2019-02-10 [2] CRAN (R 3.5.3)
 testthat      2.2.1   2019-07-25 [2] CRAN (R 3.5.3)
 tibble        2.1.3   2019-06-06 [2] CRAN (R 3.5.3)
 tidyselect    0.2.5   2018-10-11 [2] CRAN (R 3.5.3)
 usethis       1.5.1   2019-07-04 [2] CRAN (R 3.5.3)
 withr         2.1.2   2018-03-15 [2] CRAN (R 3.5.3)
 xfun          0.8     2019-06-25 [2] CRAN (R 3.5.3)
 xlsx        * 0.6.1   2018-06-11 [2] CRAN (R 3.5.3)
 xlsxjars      0.6.1   2014-08-22 [2] CRAN (R 3.5.3)
 xtable        1.8-4   2019-04-21 [2] CRAN (R 3.5.3)
 yaml          2.2.0   2018-07-25 [2] CRAN (R 3.5.3)

[1] /home/aaa17679/R/x86_64-pc-linux-gnu-library/3.5
[2] /opt/microsoft/ropen/3.5.3/lib64/R/library

And this is my RStudio server info:

> RStudio.Version()

$mode
[1] "server"

$version
[1] ‘1.2.1335’