Wordpress with WPML and Cloudflare problem

I got problem with Cloudflare. Got some websites with 2 languages based on WordPress and WPML. Other websites work good, but one does not work ok with Cloudflare. In WPML I use different domain for second language and it is not validating while Cloudflare is active on this domain:

When I turn off Cloudflare or turn on Development mode it is validating then:

Other my websites made the same way are validating also with Cloudflare turned on or Development mode turned off, but this one not, how can I make it work?

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