giorgiomalagutti

Yes, I verified everything (memory, disk space for the database, disk space for the pages, CPU usage). Nothing wrong. I hoped somebody had the same issue.

in the table wp_options I have only found the key
learn_press_logout_redirect_page_id
with no value
and another redirect related to woo_commerce
woocommerce_cart_redirect_after_add
that I assume has nothing to do with the issue. What should I do, exactly and whY did it change at all in your opinion?

I performed the conflict check as described, when in diagnostic mode I loaded the 3 plugins: Elementor + Yoast + LearnPress and it worked. As soon as I exited diagnostic mode it stopped working.
With only Yoast active (+ Elementor) it does work in the same theme but if I activate LearnPress it stops working.
If I activate LearnPress + Elementor but without Yoast it does work.
It looks like it is a conflict starting from a mix of plugins.
JavaScript does not report any error, when I try to edit using Elementor the page remains blank.

Wordpress 5.0.2
Yoast 9.4
Elementor 2.3.8
Theme: Efor and it has also Efor child
https://themeforest.net/item/efor-coaching-online-courses-wordpress-theme/22838389
by >> PixelWars
just purchased and installed
Apparently the issue is more on Elementor side because when I activated separately 2 distinct analytics plugins I had the same issue. As soon as I deactivated them (tested separately, one by one) it started working again.
Now it works, I have Yoast + Elementor, but I had to decativate Learnpress (is this one causing trouble?)
Nevertheless there is clearly a conflict here.
Do you need the entire list of plugins?