nitwee

Following your steps, issue is now solved!

-I’m using Yoast Version 16.1.1
-All other Plugins are up to date

Issue was coming from cache/cookies on Chrome.
First I tried on Edge and it worked, then I cleared cache/cookies on Chrome and it’s now working as before! I can edit my posts!
Thank you for your support.

Actually, I also found all of this CSS still on my archive page:

.preloader-plus{position:fixed;top:0;left:0;width:100%;height:100%;width:100vw;height:100vh;opacity:1;background-color:#fff;z-index:999;transform:scale(1)}
.preloader-plus *{opacity:1;transform:translate(0,0) scale(1)}
.preloader-plus .preloader-site-title{padding:0}
.preloader-plus .preloader-content{position:absolute;top:50%;left:50%;transform:translate3d(-50%,-50%,0);width:100%;display:-ms-flexbox;display:flex;-ms-flex-flow:column nowrap;flex-flow:column nowrap;-ms-flex-align:center;align-items:center;-ms-flex-pack:center;justify-content:center}
.preloader-plus .preloader-content>:not(:last-child){margin-bottom:20px}
.preloader-plus .prog-bar-wrapper:not(.middle){position:fixed;width:100%;left:50%;right:50%;transform:translateX(-50%)}
.preloader-plus .prog-bar{width:0;height:5px;background-color:red}
.preloader-plus .prog-bar-bg{position:absolute;width:100%;height:5px}

Ok, I just sent you an email with website URL and screenshots of the problem.
Thanks for your support.