I am running the latest emacs compiled from source (27.0.50). My configuration parameters are in the configure.txt attached file.

My problem:

M-x eww RET arxiv.org RET

returns the error in the title of this message:

error in process filter: Window system frame should be used

I am attaching the debugger trace produced upon setting debug-on-error to 't' (the file is trace.txt).