... and can't edit my photos because the develop module isn't working.
Why can't you edit your photos? Exactly what happens? Describe in detail! If there is an error message, please quote the exact complete unedited word-for-word error message.
OR show us a screen capture.
Also, please state the EXACT version number of your Lightroom (go to Help->System Info) and also please state the exact version of your operating system.
Are you paying for Lightroom on a monthly basis, or did you purchase the software license with a single payment?
When I switch from Library to Develop this is what it says:
Develop module is disabled.
Please restart Lightroom to sign in to the Creative Cloud.
Mac OS X 10.11.1
I am using Lightroom 5 and don't have a subscription, just the single license, but this is what shows up in the system info:
Lightroom version: 5.7.1 
License type: Creative Cloud
The license type is Creative Cloud, so if you haven't paid the subscription, it simply won't work.
You need to enter your Lightroom 5 serial number so that you no longer have the Creative Cloud license, but rather the stand-alone license.
I'm not 100% sure how to do that in Lightroom 5, I don't have it any more, but I'm sure you can figure it out. I believe there is a Register command under the Help menu.