It is no longer possible to save settings.

o, this version does not fix the issue. Clean install of WP Fastest Cache, settings, enable and whn saving, the enable checkbox is unchecked again... I disabled the Complianz plugins since I found somewhere that these can conflict...
|I am battling this for hours now using AI and tried a lot of thinsg.. I have to give up and try another plugin for now. 
Used WP Fastest Cache for years.. Hopefully this can be fixed...

PHP 8.3, IIS, WIndows Server, WP Latest with these plugins

3/15/2026 10:45 PM advanced-custom-fields-pro
03/15/2026 11:09 PM akismet
12/24/2025 08:53 PM complianz-gdpr
03/13/2025 10:43 PM complianz-terms-conditions
03/15/2026 11:18 PM connect-polylang-elementor
03/15/2026 11:36 PM custom-fonts
03/15/2026 11:12 PM elementor
03/15/2026 11:09 PM elementor-pro
03/15/2026 11:09 PM essential-addons-for-elementor-lite
03/13/2025 10:43 PM fivo-docs
03/15/2026 11:41 PM indeed-membership-pro
06/05/2014 03:59 PM 28 index.php
03/15/2026 11:49 PM jet-engine
03/15/2026 11:49 PM jet-smart-filters
12/24/2025 09:28 PM jet-tabs
03/15/2026 11:39 PM jupiter-donut
03/15/2026 11:38 PM jupiterx-core
03/16/2026 12:29 AM 0 plugins.txt
03/15/2026 11:09 PM polylang
12/24/2025 09:15 PM prevent-direct-access
03/13/2025 10:43 PM raven
03/15/2026 11:16 PM really-simple-ssl-pro
03/15/2026 10:31 PM redis-cache
03/15/2026 11:33 PM sb-elementor-contact-form-db
03/15/2026 11:21 PM taxonomy-terms-order
03/13/2025 10:43 PM user-menus
03/16/2026 12:22 AM wp-fastest-cache
03/15/2026 11:09 PM wp-mail-smtp
03/13/2025 10:43 PM wunderwp

• This reply was modified 1 month, 2 weeks ago by marcverkade.

No I did not but I have used Fastest Cache for ages with Elementor, why does this suddenly fails?
There should be a way out since many other plugins can be used with Elementor…
I will check it out and let you know!