Now I am not so sure that it is JCH as after 30m it has happend again

This one says SYNTAX ERROR: Unexpected token I in JSON at position 0

Actually it return invalid token when you subscribe from the module.

Based on what i checked on your site again, it seems like there got several plugin related the cache like JotCache - plugin, but i am not sure when i disabled this plugin on your site, did it only work fine for a while or will it somewhere still cached this Easyblog token on the subscribe form.

But for now, it seems fine for me once i disabled this plugin.

And theres no way for it to work with jotcache? Jot cache also helps my performance a lot

You have to modify the code do not check for the token, you can refer on my attached screenshot below which line of code you need to comment out.

JoomlaFolder/components/com_easyblog/views/subscription/view.ajax.php

[gist type="php"]
// EB::checkToken();
[/gist]

The reason why we need to add those tokens into the submit form is because those tokens have to prevent these CSRF Attack, you can read more this following reference link : https://docs.joomla.org/How_to_add_CSRF_anti-spoofing_to_forms

By the way, that is not only cache system can only increase site performance because if all the HTML content already cached by 3rd party cache system, all the upcoming new status will not appear on the page immediately if the page already get cached in certain time.

I would suggest change to use mod_pagespeed from your server, it's actually an apache / nginx module that can be used to compress and minify a page on the web server's layer without compromising performance of php.

Then enabled Gzip compression from backend, it will reduces the file size of all scripts and css files being rendered on the page.

You can read more about mod_pagespeed from https://developers.google.com/speed/pagespeed/module/

Should I use mod_pagespeed with JCH or without?

Ah I see that it is a google add on which has to be done server side and it isnt a joomla extension. This may require some research and testing on my end as I am not familiar with it.

Thanks Arlex

If you consider to use this mod_pagespeed next time, so no need to use JCH Optimise extension.

For now if you would like to avoid hitting invalid token while enable cache plugin from your site, you can modify that code file what i mentioned at my previous reply.

too much risk so I will skip it

Thanks Arlex

Hi there,

You are most welcome.

Just for your information, I have locked and marked this thread as resolved to avoid confusions in the future. Please start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiries.

Thanks for understanding.