I followed your suggestions exactly and here are the results.
1(a). Created an event for tomorrow and checked the Send mail now and did not receive an email.
(b). Went back to settings and checked the Remote button and ran the lcalcron.php file from the browser...
(c) got a blank page but no email notification
(d) changed the URL to the correct one
Set up a cron job to run this morning and received the same error message I have been receiving...Fetched URL
BTW, I tried the Test Email button in the settings in the first section. It said that an email was sent but I have not received one. I tried it with both PHP mailer and smtp modules.
Now comes your second suggestion and after re-reading it, I may have found the problem myself. You ask that I provide temporary FTP access, which I can do but then you ask for access to the mysqlite db and that is where I noticed that the mysqlite db is in a folder marked db in the root folder of the calendar application, so you will be able to access it without having any credentials. when I installed the calendar using the mysqlite db, it did not ask for any log in credentials. Is that where the db is supposed to be?
Send me your email address to firstname.lastname@example.org and I will provide FTP access.
BTW, I have friends in Brussels, how far do you live from there?
UPDATE: I sent you the FTP credentials to your email address...I found it.