Hmm … I can see the same thing using Firefox on the desktop. In the first instance can you “flush” permalinks, simply by visiting the Permalinks Settings screen? You don’t need to change anything, just visiting that screen should clear things up.
If that doesn’t resolve this, can you:
- Deactivate all other plugins except for The Events Calendar and Events Calendar PRO
- Ensure both of those plugins are at the latest version
- Switch to a default and completely unmodified theme such as Twenty Thirteen
- Repeat the permalink flush step
Can you now access that page? If you can, begin reactivating everything and test at each stage to see if you can figure out the source of the problem.
Does that get us any further?