I've been using elog for a few years now.  I've had the current setup working for me up until today.  

If I create a new message (entry, whatever they are called), or if I attempt to update an existing message, only the header information is saved.  The body (the part I can see in the editor) does not get saved.

Yesterday, I did do some updates on the server machine.  Among them was an update to apache2, but I am not using apache2 (I can disable apache2, and elogd continues serving elog on client machines).  Also updated were several python3 packages; I ran into a compatibility problem with python3 with a different package, so I wonder if that could have some impact for elog also.  About 50 packages were updated altogether.

Here are the packages that were updated yesterday (in case this is of interest to solving the issue):

 bind9-host:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 ckeditor:amd64 (4.5.7+dfsg-2, 4.5.7+dfsg-2+deb9u1)
 cron:amd64 (3.0pl1-128+deb9u1, 3.0pl1-128+deb9u2)
 dnsutils:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 firefox-esr:amd64 (78.14.0esr-1~deb9u1, 78.15.0esr-1~deb9u1)
 libapache2-mod-php7.0:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 libavcodec57:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libavfilter6:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libavformat57:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libavresample3:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libavutil55:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libbind9-140:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libcups2:amd64 (2.2.1-8+deb9u6, 2.2.1-8+deb9u7)
 libcupsimage2:amd64 (2.2.1-8+deb9u6, 2.2.1-8+deb9u7)
 libdns162:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
libdns-export162:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libdw1:amd64 (0.168-1, 0.168-1+deb9u1)
 libelf1:amd64 (0.168-1, 0.168-1+deb9u1)
 libfaad2:amd64 (2.8.0~cvs20161113-1+deb9u2, 2.8.0~cvs20161113-1+deb9u3)
 libicu57:amd64 (57.1-6+deb9u4, 57.1-6+deb9u5)
 libisc160:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libisccc140:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libisccfg140:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libisc-export160:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libjbig2dec0:amd64 (0.13-4.1, 0.13-4.1+deb9u1)
 liblwres141:amd64 (1:9.10.3.dfsg.P4-12.3+deb9u9, 1:9.10.3.dfsg.P4-12.3+deb9u10)
 libnghttp2-14:amd64 (1.18.1-1+deb9u1, 1.18.1-1+deb9u2)
 libntfs-3g871:amd64 (1:2016.2.22AR.1+dfsg-1+deb9u1, 1:2016.2.22AR.1+dfsg-1+deb9u2)
 libopencv-core2.4v5:amd64 (2.4.9.1+dfsg1-2, 2.4.9.1+dfsg1-2+deb9u1)
 libopencv-imgproc2.4v5:amd64 (2.4.9.1+dfsg1-2, 2.4.9.1+dfsg1-2+deb9u1)
 libpostproc54:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libpython3.5:amd64 (3.5.3-1+deb9u4, 3.5.3-1+deb9u5)
 libpython3.5-minimal:amd64 (3.5.3-1+deb9u4, 3.5.3-1+deb9u5)
 libpython3.5-stdlib:amd64 (3.5.3-1+deb9u4, 3.5.3-1+deb9u5)
 libruby2.3:amd64 (2.3.3-1+deb9u9, 2.3.3-1+deb9u10)
 libsdl1.2debian:amd64 (1.2.15+dfsg1-4, 1.2.15+dfsg1-4+deb9u1)
 libswresample2:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 libswscale4:amd64 (7:3.2.15-0+deb9u4, 7:3.2.16-1+deb9u1)
 ntfs-3g:amd64 (1:2016.2.22AR.1+dfsg-1+deb9u1, 1:2016.2.22AR.1+dfsg-1+deb9u2)
 php7.0-cli:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-common:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-curl:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-intl:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-json:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-mbstring:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-opcache:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-readline:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 php7.0-xml:amd64 (7.0.33-0+deb9u11, 7.0.33-0+deb9u12)
 python3.5:amd64 (3.5.3-1+deb9u4, 3.5.3-1+deb9u5)
 python3.5-minimal:amd64 (3.5.3-1+deb9u4, 3.5.3-1+deb9u5)
 ruby2.3:amd64 (2.3.3-1+deb9u9, 2.3.3-1+deb9u10)
 tzdata:amd64 (2021a-0+deb9u1, 2021a-0+deb9u2)

This is a devuan ascii server only for clients on a local area network.