Add Files button missing or no longer visible. Version 5.4.0.5

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Hello,

I can no longer add files in File Manager that are in my public_html/files/incoming folder. I am able to view them fine but when it comes time to add them there is no button to press. I can check the box fine and everything else seems to work properly.

It may be a coincidence but I think the issue occured around the time I updated to 5.4.0.5 about a month ago; is this a known issue or should I revert back?

I have tried to google the issue and looked around in the forum some but was unable to find a solution.

Thanks.