Error occurred during transmission

Just upgrade to R 3.6.0 and Rstudio Server Pro 1.2.1335-1. Unfortunately, as a user, I now keep getting "Error occurred during transmission". I tried restart Rstudio Server and removing the .rstudio directory but no luck. Any suggestions?

EDIT: Additional information from the Rstudio Admin page:

**15 Jun 2019 19:30:55**  [rsession-vnijs] ERROR R SUICIDE: ERROR r error 4 (R code execution error) [errormsg=Error: option error has NULL value
]

OCCURRED AT: [executeSafely@r/RExec.cpp#224](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/r/RExec.cpp#L224)

LOGGED FROM: [rSuicide@session/SessionMain.cpp#1117](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/session/SessionMain.cpp#L1117)
**15 Jun 2019 19:30:55**  [rsession-vnijs] ERROR r error 4 (R code execution error) [errormsg=Error: option error has NULL value
]

OCCURRED AT: [executeSafely@r/RExec.cpp#224](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/r/RExec.cpp#L224)

LOGGED FROM: [RReadConsole@r/session/RStdCallbacks.cpp#292](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/r/session/RStdCallbacks.cpp#L292)
**15 Jun 2019 19:30:49**  [rsession-vnijs] ERROR R SUICIDE: ERROR r error 4 (R code execution error) [errormsg=Error: option error has NULL value
]

OCCURRED AT: [executeSafely@r/RExec.cpp#224](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/r/RExec.cpp#L224)

LOGGED FROM: [rSuicide@session/SessionMain.cpp#1117](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/session/SessionMain.cpp#L1117)
**15 Jun 2019 19:30:49**  [rsession-vnijs] ERROR r error 4 (R code execution error) [errormsg=Error: option error has NULL value
]

OCCURRED AT: [executeSafely@r/RExec.cpp#224](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/r/RExec.cpp#L224)

LOGGED FROM: [RReadConsole@r/session/RStdCallbacks.cpp#292](https://github.com/rstudio/rstudio/blob/f1ac34523717ba07c0ce02b88c38574bb66879e2/src/cpp/r/session/RStdCallbacks.cpp#L292)

This should be fixed in the preview release -- it's caused typically by having a custom error handler set in a startup profile (e.g. options(error = <...>)).

Excellent! Thanks @kevinushey