Hey Charles,
You mentioned that colleague that was me, if I recall correctly I already told you that what my suspect is your current Joomla is not fully updated and it seems like your webhosting provider setup something blocked all the script when you load your backend page, so make all the button is not working in your backend, you can take a look of my screenshot below.
[Edited] The reason why when you update to 5.0.29 everything is not working again is because after you trying to update, it actually no go through the installation update process, so everything get messed up.
May i know do you have consult with your webhosting provider regarding this yet? If can keep us updated once you get your hosting response.
By the way, I already manually updated all the latest file in your site again, now you should able to click the login button from your Easyblog toolbar and create a post.
Note: Try get your webhosting provider to help on this before you update next version again.
Looking forward of your response.