উইকিপিডিয়া:Twinkle/Fixing RPP
It appears that Twinkle is having trouble finding the correct place to insert a request for page protection at WP:RPP.
This is most likely because someone has accidentally removed the wiki-markup pattern that Twinkle looks for on the RPP page. Usually what is missing is the template that appears directly below the heading.
The wiki-markup that Twinkle tries to find when placing a request for protection is as follows:
== Current requests for protection == {{Wikipedia:Requests for page protection/PRheading}}
For requests for unprotection, this markup is looked for:
== Current requests for unprotection == {{Wikipedia:Requests for page protection/URheading}}
There must be no other characters on these two lines of markup.
To make Twinkle work again, edit the relevant section of WP:RPP and re-insert the above markup (or remove other, extraneous text from these two lines).
Further questions should be directed to WT:TW.