I am getting an error trying to open the Shift-E menu while using Factorio v0.18.34 (current as of 2020-06-28) on Linux:

The mod Ammo Loader+ (0.18.17) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event ammo-loader::ammo-loader-key-filter-window (ID 158)
Unknown style standalone_inner_frame_in_outer_frame
stack traceback:
ammo-loader/lib/Gui.lua:103: in function 'build'
ammo-loader/lib/Gui.lua:263: in function 'chestFilters'
ammo-loader/lib/Gui.lua:360: in function <ammo-loader/lib/Gui.lua:345>
stack traceback:
[C]: in function 'add'
ammo-loader/lib/Gui.lua:103: in function 'build'
ammo-loader/lib/Gui.lua:263: in function 'chestFilters'
ammo-loader/lib/Gui.lua:360: in function <ammo-loader/lib/Gui.lua:345>

Also getting this same error.

Hi guys! I know I'm super late here, but I'd like to know if this issue is still around.

The style in question is defined in factorio's base mod, so I really don't understand how the style can't be found. The only thing I can think of is that perhaps it doesn't exist on the linux version, in which case I need to find out which styles I can safely use.

Hopefully, though, this has been fixed in a subsequent Factorio update. If not, let me know and I'll see what I can find out.

I am using v0.18.45 now and Shift-E now brings up a chest filters popup, so, thanks?

Your Linux comment reminded me of a previous issue I have seen, where the file names must match casing in Linux, but Windows ignores casing differences. This might have been an issue that was accidentally fixed somewhen.