Failed to render Arabic font in some window

[abdu]

What insufficient condition and how to fix issue by the message here,
below all with one number 0024:

...

Code: Select all

fixme:richedit:IRichEditOle_fnInPlaceDeactivate stub 03218E38
fixme:uniscribe:GSUB_apply_ChainContextSubst   TODO: subtype 1 (Simple context glyph substitution)
err:uniscribe:GSUB_apply_ChainContextSubst Chain failed to generate a glyph.
err:uniscribe:UpdateClusters Unable to find target glyph

(repetitive)

It failed to display/render Arabic font in some window/pane (not all), which is, of app's POV, its hardcoded data (.DATA) i.e. not the app.'s object to be processed in runtime
Else than this one, all are greatly displayed/rendered into Arabic font