Internal server error, Redis conflict?
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One of our sites got frequent ‘internal server error’ warnings. Nothing is is the wplog and nothing in the php 8.2 log. We tried php 8.1 and 8.3, but same error. The admin login kept working.
In the admin screen we cleared the cachees (wp-optimize and redis), and the site was back again.There are no relevant errors in the Chrome inspector shown.We disabled wp-optimize pro and installed W3 Total cache. Same problem.
Disabling redis. No problem.
I changed back to our wp-optimize pro and activated redis again, but now disabled the elementor page duplicator. Thus far no errors anymore.Our client also mentioned that he uses the page duplicator and that he has to publish the page twice before it is shown.
I do not know what is wrong, but the duplicator seems the problem. Other sites with wp-optimize, redis and elementor pro do not have that problem as far as we’ve seen. We have 20+ sites with similar plug-ins, but some not with the base theme hello-elementor but Zakra pro.
We have an other site that also uses the WPML pro, but not the elementor page duplicator. That site has no problems.
B.t.w. The plugin Better Plugin Compatibility Control says the duplicator plugin is compatible up to wp 6.0.
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