That did it. I was able to activate it with no issues. Thank you!
1. I installed it both ways.
2. My php version is 5.4.45 (through HostGator) and WordPress is 4.9.8
3. Trying to install 2.1.2
4. I cleared my cache (and I don’t have a caching plugin that I know of) and restarted my computer. Reinstalled. Still no luck.
Thank you.
