Hi @gogster,
Sorry to hear about the issue. Does this concern a Multisite WordPress installation or a ‘regular’ single-site install?
At first glance, it seems that such an issue can occur in combination with object caching. Do you to happen to use any caching solutions like Redis/Memcached on this environment, or similar? If so, could you try purging any such caches on your environment, to see if that might already correct the behavior?
We’ll also have a look at the cache validation in the plugin in an upcoming release to catch/handle such situations, but the above is what I’d recommend trying for now.
Kind regards, Jarno
Hi, it’s a regular single-site install. I can confirm that it is in relation to the redis object cache plugin https://en-gb.ww.wp.xz.cn/plugins/redis-cache/. If I delete object-cache.php I can access the admin again but if I re-enable object caching I’m back to square one.
I tried disabling SB and enabling redis cache, flush the cache then re-enabling SB but the issue came back so I cannot have object caching without breaking the site now.
Hi @gogster,
Thanks for confirming this. Our suspicion is that Object Cache serializes an array to a string, and the plugin doesn’t accept a string here. This likely causes the issue to recur as soon as the cache is rebuilt.
We’ve prepared a fix for the above issue, please find that version of plugin attached below. If this is indeed what’s happening here: it should solve the error.
Download: https://handover.blue/get/8efafab6-ac45-4c2d-a7bb-d8ba00980bec
Install: Plugins -> Add New -> Upload Plugin -> “Replace”
Let me know about your findings!
Kind regards, Jarno
Yes, that plugin works. Thank you for your prompt attention.
