Ouch, this doesn't look good and there are various reasons why this could happen. The best ways to solve this:
Update Photoshop to the most recent version to avoid any legacy bug
Try to import a single layer before selecting many at once
If you get a warning of unsupported types of layers, convert them into plain image/vector layers
And check that your layers are not inadvertently linked as clipping masks (a down-facing angled arrow should show up on the left of the layer's preview. In this case, just press
Alt + clickbetween two layers to break this link):
On Windows
Try installing Visual C++ Redistributable Packages for Visual Studio 2013 as it includes some DLL files that are required by Photoshop:
Download and run vcredist_x86.exe from
https://www.microsoft.com/en-us/download/details.aspx?id=40784Try importing a glyph again
If none of these tricks work, then just send us your PSD along with a description of which layers do not import to hello@fontself.com