WordPress Speed Up Service | WordPress Website Maintenance Packages My All Plugins Deactivated Automatically Why?, by greenhorizon Dear Team/Sir/Mam/Member of WordPress, I just wanted to know since i upgrade my website from old wordpress to newest version i’m getting the error. Only 1 error i’m getting that (The plugin does not have a valid header). With every plugin it is happining. Please fix this or tell me what i’m missing in my codes or anywhere. Should i delete pluggable folder which cache for my plugins or tell me. Please anyone solve i would appreciate him/her. My All Plugins Deactivated Automatically Why?