Blank Page Issue After Upgrading to Version 6.3 When Editing or Adding New Posts

Did you try increasing the memory_limit for PHP ? If not, try increasing the memory_limit. Enabling error logs and setting wp_debug to true would shed some light on the problem as well.

Do you have the Yoast SEO v20.13 plugin running?

@milesweb How to increase?

@milesweb

I set debug true. And it shows some error messages on the Dashboard.

https://photos.app.goo.gl/crrD2j2vCkVbrT2U6

First Chinese shows in Englis is as below:

“Notice: has_cap was called with an argument that is deprecated since version 2.0.0! Usage of user levels is deprecated. Use capabilities instead”

I really don’t understand what this mean. Just cut the function.php 5737 as below:

https://photos.app.goo.gl/tfVH8c36V2mFqx9z5

And there are the other two, I cut the function.php also.

7127

https://photos.app.goo.gl/r4DVTiFBXwW2iq3p7

2182

https://photos.app.goo.gl/CAUUs62aGrkPJCTC8

And there are some other information not from function.php. I didn’t cut it yet.

I lose not only page and post edit or add function, but also add media, I cannot show what photos or video anymore. I just search from the server panel and copy the image address.

finally, I upgrade the plugin Smart-Slider3 and it become normal.

I thought this was solved, and tq for you.

Thanks.