There is a unicode character in the file index.tex which prevents it from compiling (an asian end of sentence character). It needs to be replaced by an ascii full stop character.
(./index.tex (/usr/local/texlive/2019/texmf-dist/tex/latex/psnfss/t1pcr.fd)
! Package inputenc Error: Unicode character 。 (U+3002)
(inputenc) not set up for use with LaTeX.
See the inputenc package documentation for explanation.
Type H <return> for immediate help.
...
l.11 ...com/Nextion_HMI_Solution}{\tt the wiki。}
The wiki provdies all the...
There is a unicode character in the file index.tex which prevents it from compiling (an asian end of sentence character). It needs to be replaced by an ascii full stop character.