I use ACF Pro and since that I updated to 5.3.8, today, the button for images upload (type image) doesn’t work… the WordPress Media Gallery window to select image doesn’t opening.
I tested on Windows 10: Edge, Chrome and Firefox. It doesn’t works.
Thanks for the bug report.
We have had similar issues raised today and will have this fixed ASAP.
To avoid duplicate threads, can you please follow the instructions here:
Hello, I noticed a similar problem with the button on version 5.7.13
UPD. Everything is working. The JQUERY was not properly connected in the template.