UE4 HTML5 package crash with plugin

Hi

How I fixed it is implement my own code for the plugins I needed and made sure I disabled all plugins. So technically I did not fix it at all, I just avoided the issue.

Do you mean
that you turned off all plugins (both all Built-in plugins and all third party plugins) including Low Entry Json plugin and VaRest
then
you made your own plugin by coding yourself instead of using Low Entry Json plugin?