Attempt to read property “post_content”

Hey, thank you for the request. I review it in a couple of days and will give you the update.
Could you, please, provide some additional info, like what WordPress version is used and what plugins are installed?!

Hi, @sergeykuzmich

Sure. I use latest WP version (6.5.3). And I use latest php version (8.3.2). Theme:?Shamrock (1.1) by Meks. You can see your plugin on this page of my website: https://litfan.ru/vse-stati/

Active plugins: AnyComment 0.3.6, Append Link on Copy 0.2, ARI Stream Quiz 1.8.5, Asset CleanUp Pro: Page Speed Booster 1.2.5.0, Broken Link Checker 2.2.4, Classic Editor 1.6.3, Contact Form 7 5.9.5, Easy Affiliate Links 3.7.3, Fixed Widget 6.1.0, Inline Spoilers 1.5.4, Loco Translate 2.6.9, MaxButtons 9.7.8, Popup Maker 1.19.0, Post Views Counter 1.4.6, Really Simple SSL 8.1.3, Responsive Lightbox & Gallery 2.4.7, Table of Contents Plus 2402.1, Webcraftic Clearfy – WordPress optimization plugin 2.2.1, WordPress Popular Posts 6.4.2, Wp-Insert 2.5.1, WP External Links 2.60, WP Fastest Cache 1.2.7, WPFront Notification Bar 3.4.2, WP Mail SMTP 4.0.1, Yet Another Related Posts Plugin (YARPP) 5.30.10, Yoast SEO 22.7

Hi again,

Should be working now. Please, check version 1.5.5.

Thank you.

@sergeykuzmich , I guess, it did help. No warnings for 9 hours. Thanks!

Also, can I ask you??Is it possible to create several spoilers inside 1 spoiler with the help of your plugin? If not, then is it possible to add this function in future? It would be very useful to put my subcategorial posts’ links inside category spoilers (and not create separate spoilers for them, like I do now).

Yeah, there were the same request for spoilers inside of spoilers earlier. I work on global plugin update and plan to include this feature there.