routing.yml for a custom form not working
Try these steps one by one. 

Keep calm.

1) Check you are in the correct domain in your browser 


Ugh, I hate when this happens, wrong domain, lol. 


2) Check you're uploading or committing to the correct environment 


Download the file from the server to see if it indeed changed and make sure you're in the correct environment.


3) Check that your form (SREventListForm.php) is indeed inside the /Form folder.

Simplify your process

4) Back up your current module. Delete all the other routes except for the one that you're trying to dbug.

5) Simplify your form's code. Put some basic code in there.

6) Change your routes path