There’s no need to invest in the PRO calendar and, in fact, I would not recommend doing that until we solve the problem with The Events Calendar itself.
I’d like to have no Background Opacity and wanted to test with these plugins if it works but it didn’t.
I’m not sure what you mean exactly, re background opacity, and would suggest setting that issue aside while we look at the 404 error.
How about this: first, please try the steps described here. If those don’t work, consider trying the following steps.
- Can you install a clean copy of WordPress in a subdirectory, to use as a testing site? (ie, example.com/test-wp)
- Start by installing The Events Calendar but don’t install anything else (and stick to a default, unmodified theme to begin with)
- Add some events and confirm everything is working as expected with no 404 Errors where you should see events
If you hit problems at this stage, please pause and reply with a link to your test site. Otherwise please continue as follows:
- Install and activate the same theme that you have on your live site
- Does this introduce the problem?
- If it doesn’t, install and activate each of the same plugins you have on your live site
- Does one of those introduce the problem (if so, which)?
This should help us to identify the conflict.