I remember that I was not able to run h2o cluster on shinyapps.io. Is it possible to run it on shinyapps server? Actually, in 2018 I did not face that error. The reason was Java 8 because we usually install it separately / manually. I could upload app but could not run cluster there last time. Now, I am facing this error (below).
**Preparing to deploy application...DONE**
**Uploading bundle for application: 924996...DONE**
**Deploying bundle: 2123701 for application: 924996 ...**
**Waiting for task: 618821515**
**building: Processing bundle: 2123701**
**building: Parsing manifest**
**building: Building image: 2239205**
**building: Fetching packages**
**building: Building package: h2o**
**################################ Begin Task Log ################################**
**################################# End Task Log #################################**
**Error: Unhandled Exception: Child Task 618821517 failed: Error building image: Error fetching h2o (3.24.0.3) source. <CRANPackageSource repo='http://cran.rstudio.org'> unable to satisfy package: h2o (3.24.0.3)**
**In addition: Warning message:**
**In FUN(X[[i]], ...) :**
**Package 'h2o 3.24.0.3' was installed from sources; Packrat will assume this package is available from a CRAN-like repository during future restores**
**Execution halted**