Returns error 522 (timed out).

I tried to execute command brew install pdf2htmlEX and got error messages as follows:

HOMEBREW_CC: gcc-9
HOMEBREW_CXX: g++-9
MAKEFLAGS: -j16
CMAKE_PREFIX_PATH: /home/linuxbrew/.linuxbrew
HOMEBREW_GIT: git
ACLOCAL_PATH: /home/linuxbrew/.linuxbrew/share/aclocal
PATH: /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/shims/linux/super:/usr/bin:/bin:/usr/sbin:/sbin
Error: m4 1.4.18 did not build
Logs:
/home/lihang/.cache/Homebrew/Logs/m4/00.options.out
/home/lihang/.cache/Homebrew/Logs/m4/01.configure
/home/lihang/.cache/Homebrew/Logs/m4/02.make
/home/lihang/.cache/Homebrew/Logs/m4/02.make.cc
/home/lihang/.cache/Homebrew/Logs/m4/config.log
/home/lihang/.cache/Homebrew/Logs/m4/01.configure.cc
READ THIS: https://docs.brew.sh/Troubleshooting

Then I tried to use brew install m4 and got errors as follows:

==> Downloading https://ftp.gnu.org/gnu/m4/m4-1.4.18.tar.xz
Already downloaded: /home/lihang/.cache/Homebrew/downloads/bb74c92bda9bdc32be0653ca50751920ff35cfe8f329499d0bea86fbe66ce580--m4-1.4.18.tar.xz
==> ./configure --prefix=/home/linuxbrew/.linuxbrew/Cellar/m4/1.4.18
==> make
Last 15 lines from /home/lihang/.cache/Homebrew/Logs/m4/02.make:
92 | #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
| ^~~~~
make[3]: *** [Makefile:1915: freadahead.o] Error 1
make[3]: *** Waiting for unfinished jobs....
fseeko.c: In function 'rpl_fseeko':
fseeko.c:110:4: error: #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib."
110 | #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib."
| ^~~~~
make[3]: *** [Makefile:1915: fseeko.o] Error 1
make[3]: Leaving directory '/tmp/m4-20201024-24482-13va2rn/m4-1.4.18/lib'
make[2]: *** [Makefile:1674: all] Error 2
make[2]: Leaving directory '/tmp/m4-20201024-24482-13va2rn/m4-1.4.18/lib'
make[1]: *** [Makefile:1572: all-recursive] Error 1
make[1]: Leaving directory '/tmp/m4-20201024-24482-13va2rn/m4-1.4.18'
make: *** [Makefile:1528: all] Error 2
READ THIS: https://docs.brew.sh/Troubleshooting

unfamiliar with make, could anyone help me about it?

Great program! It would be nice to have onscreen instructions for saving the modified PDF.

Loading the url https://simpdf.com/edit directly will cause a 404
Should this be handled in the hosting configuration?
or in app level?

Tested on Safari 12.1.2, macOS 10.14.6.

Hi,

Can you add the license info for the source code? Can I use it further for other projects?

Thanks, it's a great tool.