Title: Error installing 5.1.5 version
Last modified: August 6, 2026

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# Error installing 5.1.5 version

 *  Resolved [kermito](https://wordpress.org/support/users/kermito/)
 * (@kermito)
 * [4 days, 12 hours ago](https://wordpress.org/support/topic/error-installing-5-1-5-version/)
 *     ```wp-block-code
       [06-Aug-2026 12:04:39 UTC] PHP Parse error:  syntax error, unexpected '|', expecting ';' or '{' in /www/wp-content/plugins/double-opt-in/core/CleanUp.class.php on line 85
       ```
   
 * It doesn’t install on wordpress 7.0.2 with php 7.4
   Seems to be a php8 codebase
   but plugin page says it should work on php7.4What do you recommend ?

Viewing 1 replies (of 1 total)

 *  Plugin Support [forge12marc](https://wordpress.org/support/users/forge12marc/)
 * (@forge12marc)
 * [4 days, 7 hours ago](https://wordpress.org/support/topic/error-installing-5-1-5-version/#post-18986302)
 * Hello [@kermito](https://wordpress.org/support/users/kermito/),
 * thanks for reporting this issue. We’ve release a hotfix (5.1.6) to ensure compatibility
   to php7.4.
 * Best Regards
   Marc

Viewing 1 replies (of 1 total)

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 * 1 reply
 * 2 participants
 * Last reply from: [forge12marc](https://wordpress.org/support/users/forge12marc/)
 * Last activity: [4 days, 7 hours ago](https://wordpress.org/support/topic/error-installing-5-1-5-version/#post-18986302)
 * Status: resolved