markus_b

I’ve taken the following actions:

1) Verified that the site is running. My test page is ‘access’ a page with some information.
-> All is well
2) Enable the extension ‘Events Manager’
-> I get 7 message pairs like this on most pages:
Warning: preg_match(): Compilation failed: nothing to repeat at offset 1 in /home/clients/27c815ff576fae5bb4bfa5e1322f2d0e/web/wp-includes/class-wp.php on line 231
Warning: preg_match(): Compilation failed: nothing to repeat at offset 1 in /home/clients/27c815ff576fae5bb4bfa5e1322f2d0e/web/wp-includes/class-wp.php on line 232

3) Disabled *all* plugins
-> I still get the 7 message pairs like this on most pages:
Warning: preg_match(): Compilation failed: nothing to repeat at offset 1 in /home/clients/27c815ff576fae5bb4bfa5e1322f2d0e/web/wp-includes/class-wp.php on line 231
Warning: preg_match(): Compilation failed: nothing to repeat at offset 1 in /home/clients/27c815ff576fae5bb4bfa5e1322f2d0e/web/wp-includes/class-wp.php on line 232

4) Enabled the plugins again
-> I still get the 7 message pairs like this on most pages:
Warning: preg_match(): Compilation failed: nothing to repeat at offset 1 in /home/clients/27c815ff576fae5bb4bfa5e1322f2d0e/web/wp-includes/class-wp.php on line 231
Warning: preg_match(): Compilation failed: nothing to repeat at offset 1 in /home/clients/27c815ff576fae5bb4bfa5e1322f2d0e/web/wp-includes/class-wp.php on line 232

5) Went to Events > Settings > Pages > Event Pages and set the ‘Display events as’ to ‘Pages’ (was set to ‘Posts’)
-> All is well, no errors

6) Went to Events > Settings > Pages > Event Pages and set the ‘Display events as’ to ‘Posts’
-> All is well, no errors

Summary
– Enabling Events Manager somehow created the problem.
– Disabling all plugins does not eliminate the problem.
– Fiddling with Events > Settings > Pages > Event Pages -> Display events does fix it, even with Event Manage installed

Somehow something happens to some data type processed in the loop in class-wp.php around line 23[12] when Events manager is enabled.

Markus

I did not touch these settings at all.

So they are set to the default:

events
locations
events/categories
events/tags

I did play around with parameters in Events > Settings > Pages > Event Pages and set the ‘Display events as’ to ‘Pages’ and the problem went away. Then I set it back to ‘Posts’ and it did not came back.

Maybe changing this set some setting where a default was missing after the installation ?

The most recent versions: WordPress is at 4.5.3–fr_FR and Events manager at 5.6.5.

I just found a separate ‘interesting’ artifact: WP does not display the 404 page if I type a wrong URL like https://www.domain.com/this/url/does/not/exist. Instead it display the two ‘pages’ I have at the moment.

This behavior is the same with my theme and with the WP default theme.

Markus