modules and services not working

[dhall111 0]

When logged into my dashboard/back office I can't get to the modules and services.  I get the below error.  

 

[PrestaShop] Fatal error in module file :/home2/firstsu1/public_html/wonndunn/classes/module/Module.php(1361) : eval()'d code:
Can't use function return value in write context

 

I have no idea what that means.  I am an extreme novice.

[NemoPS 1,731]

It means one of your modules is broken. Did it happen all of a sudden? Did you add/upgrade anything?

[dhall111 0]

No, didn't add or upgrade anything.  How do I determine which module would be the problem?

 

[NemoPS 1,731]

Well you can prefix the folders with underscore one by one, and see when the page is back.
First off try to disable non-native modules from the performance page, though it might not be effective in the bo

[dhall111 0]

I warned you I am an extreme novice.   What is a non-native module?  I haven't installed anything that didn't come with presta shop.  I don't know how to code, or do anything other than click on the menus they give us and make selections.  that was the beauty of prestashop for me, that i didn't have to learn to code.  But I'm good at following directions if you can give me some.  

Another area not working is under Modules and Services and then Positions - I can see all of the blocks but when I click on edit for any of them I get the dreaded HTTP ERROR 500.

 

I really appreciate any help you can give.