I got a report on youtube movie, which the latest pvvx environment does not work with my previous explanation. This is the way to fix.

open open board.txt in development/rtl87xx/boards.txt

and

modify

(original) rtlmodule_rtl8710.build.ldscript=linker_scripts/gcc/rtl8710-symbol-v03-img2_arduino_arduino.ld

to

(fix) rtlmodule_rtl8710.build.ldscript=linker_scripts/gcc/rtl8710-symbol-v04-img2_arduino_arduino.ld

This is enough to work it again!