Required WebP shell functions are not available on the server

[oleglucic]

Website URL

DNS Resolution Error - Domain Not Found, Or Domain not added to hosting account

Error Message

Required WebP shell functions are not available on the server. - WP Optimize

Other Information

I’ve read that these dependencies are crucial:

passthru
shell_exec
system
proc_open

What should I do?

[oleglucic]

@oleglucic

Required WebP shell functions are not available on the server.

Plugin devs’ docs

How can I get WebP conversion tools to work?

[dan3008]

@oleglucic

shell_exec

I don’t know about any other others, but I know that shell_exec is not available on free hosting. If its essential you may need to look at premium hosting

[Greenreader9]

Functions that use/emulate command line functions are disabled on free hosting, so if that plugin requires those functions to be enabled, you can’t use it here.